{"id":3159,"date":"2026-05-04T17:59:11","date_gmt":"2026-05-04T16:59:11","guid":{"rendered":"https:\/\/www.onlinelearningsystem.net\/xyz\/?page_id=3159"},"modified":"2026-10-23T23:02:35","modified_gmt":"2026-10-23T22:02:35","slug":"topic-7-intermolecular-forces","status":"publish","type":"page","link":"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/","title":{"rendered":"Topic 7 Intermolecular Forces"},"content":{"rendered":"\n<div class=\"ols-t7-page\">\n\n  <aside class=\"ols-sidebar\">\n  <div class=\"ols-sidebar-header\">\n    <h3>Revision Notes<\/h3>\n    <p>A Level Chemistry<\/p>\n  <\/div>\n\n  <div class=\"ols-topic-group\">\n    <h4>Topic 7 Intermolecular Forces<\/h4>\n\n    <ul class=\"ols-topic-list\">\n      <li>\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/\">Topic 7 Overview<\/a>\n      <\/li>\n      <li>\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/london-forces\/\">London Forces<\/a>\n      <\/li>\n      <li>\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/permanent-dipole-dipole-forces\/\">Permanent Dipole-Dipole Forces<\/a>\n      <\/li>\n      <li>\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/hydrogen-bonding\/\">Hydrogen Bonding<\/a>\n      <\/li>\n      <li>\n        <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/anomalous-properties-of-water\/\">Anomalous Properties of Water<\/a>\n      <\/li>\n      <li>\n        <a 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margin-top: 10px;\n    }\n\n    .ols-t7-spec-mob-sub-row {\n      background: #ffffff;\n      border: 1px solid rgba(70, 127, 247, 0.15);\n      border-radius: 12px;\n      overflow: hidden;\n    }\n\n    .ols-t7-spec-mob-sub-code {\n      background: #93b5f8;\n      color: #0c2060;\n      font-size: 13px;\n      font-weight: 800;\n      text-align: center;\n      height: 30px;\n      line-height: 30px;\n    }\n\n    .ols-t7-spec-mob-sub-text {\n      padding: 12px 16px;\n      font-size: 14px;\n      font-weight: 300;\n      line-height: 1.8;\n      color: #4b5563;\n    }\n\n    \/* =========================================================\n       RESPONSIVE\n    ========================================================= *\/\n\n    @media (max-width: 1024px) {\n      .ols-t7-cards-grid {\n        grid-template-columns: repeat(2, minmax(0, 1fr));\n      }\n    }\n\n    @media (max-width: 860px) {\n      .ols-t7-intro-inner {\n        grid-template-columns: 1fr;\n        gap: 40px;\n      }\n    }\n\n    @media (max-width: 640px) {\n      .ols-t7-intro {\n        padding: 24px 0 52px;\n      }\n\n      .ols-t7-topics {\n        padding: 52px 0 58px;\n      }\n\n      .ols-t7-cards-grid {\n        grid-template-columns: 1fr;\n        gap: 14px;\n      }\n\n      .ols-t7-spec-section {\n        padding: 52px 0 64px;\n      }\n\n      .ols-t7-spec-wrap {\n        padding: 24px 18px;\n        border-radius: 20px;\n      }\n\n      .ols-t7-info-grid {\n        grid-template-columns: 1fr 1fr;\n      }\n    }\n\n  <\/style>\n\n  <!-- BREADCRUMB BAR - sits above everything -->\n  <div class=\"ols-t7-breadcrumb-bar\">\n    <div class=\"ols-t7-container\">\n      <nav class=\"ols-t7-breadcrumb\" aria-label=\"Breadcrumb\">\n          <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/\">Revision Notes<\/a> \/\n          <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/\">A Level Chemistry<\/a> \/\n          <a href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/\">Edexcel International<\/a> \/\n          <span>Topic 7 Intermolecular Forces<\/span>\n        <\/nav>\n    <\/div>\n  <\/div>\n\n  <!-- INTRO -->\n  <section class=\"ols-t7-intro\">\n    <div class=\"ols-t7-container\">\n      <div class=\"ols-t7-intro-inner\">\n\n        <div>\n          <div class=\"ols-t7-eyebrow\">Edexcel International A Level Chemistry<\/div>\n          <h1>Topic 7<br>Intermolecular Forces<\/h1>\n          <div class=\"ols-t7-accent-bar\"><\/div>\n          <p class=\"ols-t7-intro-lead\">\n            Intermolecular forces decide whether a substance is a gas, a liquid or a solid, why ice floats, why alcohols boil far above alkanes of the same size and what will dissolve in what. This topic covers London forces, permanent dipole-dipole interactions and hydrogen bonding, the anomalous properties of water, boiling temperature trends and the choice of solvents, all examined in Unit 2.\n          <\/p>\n        <\/div>\n\n        <div class=\"ols-t7-info-grid\">\n          <div class=\"ols-t7-info-card\">\n            <div class=\"ols-t7-info-card-label\">Exam Unit<\/div>\n            <div class=\"ols-t7-info-card-value\">Unit 2<\/div>\n            <div class=\"ols-t7-info-card-sub\">WCH12\/01 &#8211; IAS<\/div>\n          <\/div>\n          <div class=\"ols-t7-info-card\">\n            <div class=\"ols-t7-info-card-label\">Specification Points<\/div>\n            <div class=\"ols-t7-info-card-value\">7.1 &#8211; 7.6<\/div>\n            <div class=\"ols-t7-info-card-sub\">6 points, 17 sub-points<\/div>\n          <\/div>\n          <div class=\"ols-t7-info-card\">\n            <div class=\"ols-t7-info-card-label\">Sub-topics<\/div>\n            <div class=\"ols-t7-info-card-value\">6 pages<\/div>\n            <div class=\"ols-t7-info-card-sub\">Revision notes available<\/div>\n          <\/div>\n          <div class=\"ols-t7-info-card\">\n            <div class=\"ols-t7-info-card-label\">Exam Board<\/div>\n            <div class=\"ols-t7-info-card-value\">Edexcel IAL<\/div>\n            <div class=\"ols-t7-info-card-sub\">Pearson International<\/div>\n          <\/div>\n        <\/div>\n\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- TOPIC CARDS -->\n  <section class=\"ols-t7-topics\">\n    <div class=\"ols-t7-container\">\n\n      <div class=\"ols-t7-section-header\">\n        <h2 class=\"ols-t7-section-title\">Revision Notes<\/h2>\n      <\/div>\n\n      <div class=\"ols-t7-cards-grid\">\n\n        <!-- Card 1: London Forces -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/london-forces\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--bonding\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">Induced dipoles<\/div>\n                <div class=\"ols-t7-visual-main\">London<br>Forces<\/div>\n                <div class=\"ols-t7-visual-sub\">instantaneous dipole, induced dipole<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">1<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">London Forces<\/p>\n            <p class=\"ols-t7-card-desc\">How moving electrons create instantaneous and induced dipoles, and why electrons and shape decide their strength.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n\n        <!-- Card 2: Permanent Dipole-Dipole Forces -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/permanent-dipole-dipole-forces\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--isomerism\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">Polar molecules<\/div>\n                <div class=\"ols-t7-visual-main\">Permanent<br>Dipoles<\/div>\n                <div class=\"ols-t7-visual-sub\">\u03b4+ \u00b7\u00b7\u00b7 \u03b4\u2212 attraction<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">2<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">Permanent Dipole-Dipole Forces<\/p>\n            <p class=\"ols-t7-card-desc\">Which molecules have a permanent dipole, how polar molecules attract, and a routine for unfamiliar molecules.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n\n        <!-- Card 3: Hydrogen Bonding -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/hydrogen-bonding\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--mechanism\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">N-H, O-H, H-F<\/div>\n                <div class=\"ols-t7-visual-main\">Hydrogen<br>Bonding<\/div>\n                <div class=\"ols-t7-visual-sub\">lone pair to \u03b4+ hydrogen<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">3<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">Hydrogen Bonding<\/p>\n            <p class=\"ols-t7-card-desc\">The requirement, the four-feature exam diagram, water, ammonia and hydrogen fluoride, and predicting other cases.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n\n        <!-- Card 4: Anomalous Properties of Water -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/anomalous-properties-of-water\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--reactions\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">Ice, boiling, surface<\/div>\n                <div class=\"ols-t7-visual-main\">Anomalous<br>Water<\/div>\n                <div class=\"ols-t7-visual-sub\">open lattice, high boiling temperature<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">4<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">Anomalous Properties of Water<\/p>\n            <p class=\"ols-t7-card-desc\">Why water boils at 100 \u00b0C, why ice floats and why water has a high surface tension.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n\n        <!-- Card 5: Boiling Temperature Trends -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/boiling-temperature-trends\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--polymerisation\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">Alkanes, alcohols, HX<\/div>\n                <div class=\"ols-t7-visual-main\">Boiling<br>Trends<\/div>\n                <div class=\"ols-t7-visual-sub\">chain length, branching, HF to HI<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">5<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">Boiling Temperature Trends<\/p>\n            <p class=\"ols-t7-card-desc\">Alkane chain length and branching, alcohols against alkanes, and the hydrogen halides explained by forces.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n\n        <!-- Card 6: Choosing Solvents -->\n        <a class=\"ols-t7-card ols-t7-card--available\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/revision-notes\/a-level-chemistry\/edexcel-international\/topic-7-intermolecular-forces\/choosing-solvents\/\">\n          <div class=\"ols-t7-card-img-wrap\">\n            <div class=\"ols-t7-visual ols-t7-visual--waste\">\n              <div class=\"ols-t7-visual-panel\">\n                <div class=\"ols-t7-visual-kicker\">Like dissolves like<\/div>\n                <div class=\"ols-t7-visual-main\">Choosing<br>Solvents<\/div>\n                <div class=\"ols-t7-visual-sub\">hydration, hydrogen bonds, hexane<\/div>\n              <\/div>\n            <\/div>\n            <div class=\"ols-t7-card-num\">6<\/div>\n          <\/div>\n          <div class=\"ols-t7-card-body\">\n            <p class=\"ols-t7-card-title\">Choosing Solvents<\/p>\n            <p class=\"ols-t7-card-desc\">Hydration of ions, alcohols in water, why halogenoalkanes do not dissolve, and non-aqueous solvents.<\/p>\n            <span class=\"ols-t7-card-cta\">\n              Start revising\n              <svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 8h10M9 4l4 4-4 4\"><\/path><\/svg>\n            <\/span>\n          <\/div>\n        <\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- SPECIFICATION -->\n  <!-- OLS-SMAP -->\n<style>\r\n.ols-smap{--sm-navy:#1C244B;--sm-blue:#467FF7;--sm-teal:#0f8b8d;--sm-muted:#5f6b84;--sm-border:#e3e8f2;margin:44px auto 8px;max-width:1140px;padding:0 20px;font-family:inherit}\r\n.ols-smap-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:0 0 18px}\r\n.ols-smap-head h2{font-size:clamp(22px,2.6vw,28px);font-weight:800;color:var(--sm-navy);margin:0;letter-spacing:-.01em}\r\n.ols-smap-head p{margin:0;color:var(--sm-muted);font-size:14px}\r\n.ols-smap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,460px),1fr));gap:20px}\r\n.ols-smap-card{display:grid;grid-template-columns:150px 1fr;background:#fff;border:1px solid var(--sm-border);border-radius:22px;overflow:hidden;box-shadow:0 10px 28px rgba(28,36,75,.08);transition:transform .28s cubic-bezier(.34,1.56,.64,1),box-shadow .28s ease,border-color .28s ease}\r\n.ols-smap-card:hover{transform:translateY(-6px);box-shadow:0 24px 48px rgba(28,36,75,.14);border-color:rgba(70,127,247,.35)}\r\n.ols-smap-vis{background:linear-gradient(160deg,#1C244B 0%,#2d3c7a 100%);display:flex;align-items:center;justify-content:center;padding:14px}\r\n.ols-smap-vis svg{width:100%;max-width:118px;height:auto;display:block}\r\n.ols-smap-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:6px;min-width:0}\r\n.ols-smap-kicker{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--sm-teal)}\r\n.ols-smap-title{font-size:17px;font-weight:800;color:var(--sm-navy);margin:0;line-height:1.25}\r\n.ols-smap-board{font-size:12.5px;color:var(--sm-muted);margin:0}\r\n.ols-smap-desc{font-size:14px;color:#33405e;margin:4px 0 0;line-height:1.5}\r\n.ols-smap-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:10px}\r\n.ols-smap-btn{display:inline-flex;align-items:center;gap:8px;background:var(--sm-navy);color:#fff !important;text-decoration:none !important;font-weight:700;font-size:14px;padding:10px 18px;border-radius:999px;transition:background .2s ease,transform .2s ease}\r\n.ols-smap-btn:hover{background:var(--sm-blue);transform:translateY(-1px)}\r\n.ols-smap-btn svg{width:16px;height:16px}\r\n.ols-smap-meta{font-size:12px;color:var(--sm-muted)}\r\n.ols-smap-note{font-size:11.5px;color:var(--sm-muted);margin:14px 0 0;text-align:center}\r\n@media (max-width:560px){.ols-smap{padding:0 16px;margin-top:32px}.ols-smap-card{grid-template-columns:76px 1fr}.ols-smap-vis{padding:8px}.ols-smap-vis svg{max-width:60px}.ols-smap-body{padding:14px 14px 16px}.ols-smap-title{font-size:16px}.ols-smap-desc{font-size:13.5px}.ols-smap-btn{padding:9px 15px;font-size:13.5px}}\r\n<\/style><section class=\"ols-smap\" aria-label=\"Summary maps\"><div class=\"ols-smap-head\"><h2>Summary maps<\/h2><p>Download, print and revise the key facts of this topic at a glance.<\/p><\/div><div class=\"ols-smap-grid\"><article class=\"ols-smap-card\"><div class=\"ols-smap-vis\"><svg viewBox=\"0 0 120 120\" aria-hidden=\"true\"><g fill=\"none\" stroke=\"#ffffff\" stroke-width=\"2.4\" stroke-linecap=\"round\"><circle cx=\"60\" cy=\"60\" r=\"17\"\/><path d=\"M60 43V20M60 77v23M43 60H20M77 60h23M48 48 32 32M72 48l16-16M48 72 32 88M72 72l16 16\"\/><\/g><g fill=\"#ffffff\"><path d=\"M60 16l-4 7h8zM60 104l-4-7h8zM16 60l7-4v8zM104 60l-7-4v8zM29 29l2.5 7.5 5-5zM91 29l-7.5 2.5 5 5zM29 91l7.5-2.5-5-5zM91 91l-2.5-7.5-5 5z\"\/><\/g><g fill=\"#5fd0c9\"><circle cx=\"60\" cy=\"11\" r=\"3\"\/><circle cx=\"109\" cy=\"60\" r=\"3\"\/><\/g><g fill=\"#f2c14e\"><circle cx=\"11\" cy=\"60\" r=\"3\"\/><circle cx=\"96\" cy=\"96\" r=\"3\"\/><\/g><g fill=\"#9db8ff\"><circle cx=\"24\" cy=\"24\" r=\"3\"\/><circle cx=\"60\" cy=\"109\" r=\"3\"\/><\/g><\/svg><\/div><div class=\"ols-smap-body\"><span class=\"ols-smap-kicker\">Summary map \u00b7 PDF<\/span><p class=\"ols-smap-title\">Intermolecular Forces Map<\/p><p class=\"ols-smap-board\">Edexcel International A Level Chemistry \u00b7 Unit 2 \u00b7 Topic 7A Intermolecular Forces<\/p><p class=\"ols-smap-desc\">The whole section on one A4 page: bonds or forces, London forces, permanent dipoles, hydrogen bonds, H\u2082O, NH\u2083 and HF, and why water is odd.<\/p><div class=\"ols-smap-row\"><a class=\"ols-smap-btn\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/wp-content\/uploads\/ols-maps\/map-ial-u2-7a-forces.pdf\" download rel=\"nofollow\"><svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M8 2v8M4.5 6.5 8 10l3.5-3.5M3 13h10\"\/><\/svg>Download the map<\/a><span class=\"ols-smap-meta\">6 key ideas + a data table \u00b7 A4 portrait \u00b7 print ready<\/span><\/div><\/div><\/article><article class=\"ols-smap-card\"><div class=\"ols-smap-vis\"><svg viewBox=\"0 0 120 120\" aria-hidden=\"true\"><g fill=\"none\" stroke=\"#ffffff\" stroke-width=\"2.4\" stroke-linecap=\"round\"><circle cx=\"60\" cy=\"60\" r=\"17\"\/><path d=\"M60 43V20M60 77v23M43 60H20M77 60h23M48 48 32 32M72 48l16-16M48 72 32 88M72 72l16 16\"\/><\/g><g fill=\"#ffffff\"><path d=\"M60 16l-4 7h8zM60 104l-4-7h8zM16 60l7-4v8zM104 60l-7-4v8zM29 29l2.5 7.5 5-5zM91 29l-7.5 2.5 5 5zM29 91l7.5-2.5-5-5zM91 91l-2.5-7.5-5 5z\"\/><\/g><g fill=\"#5fd0c9\"><circle cx=\"60\" cy=\"11\" r=\"3\"\/><circle cx=\"109\" cy=\"60\" r=\"3\"\/><\/g><g fill=\"#f2c14e\"><circle cx=\"11\" cy=\"60\" r=\"3\"\/><circle cx=\"96\" cy=\"96\" r=\"3\"\/><\/g><g fill=\"#9db8ff\"><circle cx=\"24\" cy=\"24\" r=\"3\"\/><circle cx=\"60\" cy=\"109\" r=\"3\"\/><\/g><\/svg><\/div><div class=\"ols-smap-body\"><span class=\"ols-smap-kicker\">Summary map \u00b7 PDF<\/span><p class=\"ols-smap-title\">Boiling Temperatures and Solvents Map<\/p><p class=\"ols-smap-board\">Edexcel International A Level Chemistry \u00b7 Unit 2 \u00b7 Topic 7B Physical Properties<\/p><p class=\"ols-smap-desc\">The whole section on one A4 page: chain length, branching, alcohols against alkanes, the hydrogen halides, water as a solvent and other solvents.<\/p><div class=\"ols-smap-row\"><a class=\"ols-smap-btn\" href=\"https:\/\/www.onlinelearningsystem.net\/xyz\/wp-content\/uploads\/ols-maps\/map-ial-u2-7b-properties.pdf\" download rel=\"nofollow\"><svg viewBox=\"0 0 16 16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M8 2v8M4.5 6.5 8 10l3.5-3.5M3 13h10\"\/><\/svg>Download the map<\/a><span class=\"ols-smap-meta\">6 key ideas + a data table \u00b7 A4 portrait \u00b7 print ready<\/span><\/div><\/div><\/article><\/div><p class=\"ols-smap-note\">\u00a9 2026 Online Learning System. For personal study: printing is allowed; editing, copying and redistribution are not.<\/p><\/section>\n<!-- \/OLS-SMAP -->\n<section class=\"ols-t7-spec-section\">\n    <div class=\"ols-t7-container\">\n\n      <!-- DESKTOP SPECIFICATION -->\n      <div class=\"ols-t7-spec-desktop\">\n        <div class=\"ols-t7-spec-wrap\">\n          <div class=\"ols-t7-spec-pill\">Specification Coverage<\/div>\n          <h2 class=\"ols-t7-spec-heading\">Topic 7 Intermolecular Forces &#8211; Edexcel International A Level Chemistry<\/h2>\n          <p class=\"ols-t7-spec-intro-text\">The following specification points outline the knowledge and skills students are expected to demonstrate for Topic 7.<\/p>\n\n          <div class=\"ols-t7-spec-rows\">\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--mid\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--mid\">7.1<\/div>\n              <div class=\"ols-t7-spec-text\">\n                <div style=\"margin:0 0 12px;\">understand the nature of the following intermolecular forces:<\/div>\n                <div class=\"ols-t7-spec-sub-list\">\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">London forces (instantaneous dipole-induced dipole)<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">permanent dipole-permanent dipole interactions<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">hydrogen bonds<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--mid\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--mid\">7.2<\/div>\n              <div class=\"ols-t7-spec-text\">\n                <div style=\"margin:0 0 12px;\">understand the interactions that give rise to hydrogen bonding in:<\/div>\n                <div class=\"ols-t7-spec-sub-list\">\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">a<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">H\u2082O<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">b<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">liquid NH\u2083<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">c<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">liquid HF<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--mid\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--mid\">7.3<\/div>\n              <div class=\"ols-t7-spec-text\">\n                <div style=\"margin:0 0 12px;\">understand the following anomalous properties of water resulting from hydrogen bonding:<\/div>\n                <div class=\"ols-t7-spec-sub-list\">\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">its high melting and boiling temperature when compared with similar molecules<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">the density of ice compared to that of water<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--light\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--dark\">7.4<\/div>\n              <div class=\"ols-t7-spec-text\">be able to predict the presence of hydrogen bonding in molecules analogous to those mentioned in 7.2<\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--mid\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--mid\">7.5<\/div>\n              <div class=\"ols-t7-spec-text\">\n                <div style=\"margin:0 0 12px;\">understand, in terms of intermolecular forces, physical properties shown by substances, including:<\/div>\n                <div class=\"ols-t7-spec-sub-list\">\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">the trends in boiling temperatures of alkanes with increasing chain length<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">the effect of branching in the carbon chain on the boiling temperatures of alkanes<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">the relatively low volatility (higher boiling temperatures) of alcohols compared to alkanes with a similar number of electrons<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">iv<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">the trends in boiling temperatures of the hydrogen halides HF to HI<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-row ols-t7-spec-row--mid\">\n              <div class=\"ols-t7-spec-code ols-t7-spec-code--mid\">7.6<\/div>\n              <div class=\"ols-t7-spec-text\">\n                <div style=\"margin:0 0 12px;\">understand factors that influence the choice of solvents, including:<\/div>\n                <div class=\"ols-t7-spec-sub-list\">\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">water, to dissolve some ionic compounds, in terms of the hydration of the ions<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">water, to dissolve simple alcohols, in terms of hydrogen bonding<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">water, as a poor solvent for compounds (to include polar molecules such as halogenoalkane), in terms of inability to form hydrogen bonds<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-sub-row\">\n                    <div class=\"ols-t7-spec-sub-code\">iv<\/div>\n                    <div class=\"ols-t7-spec-sub-text\">non-aqueous solvents, for compounds that have similar intermolecular forces to those in the solvent<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n          <\/div>\n        <\/div>\n      <\/div>\n\n      <!-- MOBILE SPECIFICATION -->\n      <div class=\"ols-t7-spec-mobile\">\n        <div class=\"ols-t7-spec-wrap\">\n          <div class=\"ols-t7-spec-pill\">Specification Coverage<\/div>\n          <h2 class=\"ols-t7-spec-heading\">Topic 7 Intermolecular Forces &#8211; Edexcel International A Level Chemistry<\/h2>\n          <p class=\"ols-t7-spec-intro-text\">The following specification points outline the knowledge and skills students are expected to demonstrate for Topic 7.<\/p>\n\n          <div class=\"ols-t7-spec-mob-rows\">\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--mid\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--mid\">7.1<\/div>\n              <div class=\"ols-t7-spec-mob-text\">\n                <div style=\"margin:0 0 10px;\">understand the nature of the following intermolecular forces:<\/div>\n                <div class=\"ols-t7-spec-mob-sub-list\">\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">London forces (instantaneous dipole-induced dipole)<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">permanent dipole-permanent dipole interactions<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">hydrogen bonds<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--mid\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--mid\">7.2<\/div>\n              <div class=\"ols-t7-spec-mob-text\">\n                <div style=\"margin:0 0 10px;\">understand the interactions that give rise to hydrogen bonding in:<\/div>\n                <div class=\"ols-t7-spec-mob-sub-list\">\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">a<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">H\u2082O<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">b<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">liquid NH\u2083<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">c<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">liquid HF<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--mid\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--mid\">7.3<\/div>\n              <div class=\"ols-t7-spec-mob-text\">\n                <div style=\"margin:0 0 10px;\">understand the following anomalous properties of water resulting from hydrogen bonding:<\/div>\n                <div class=\"ols-t7-spec-mob-sub-list\">\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">its high melting and boiling temperature when compared with similar molecules<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">the density of ice compared to that of water<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--light\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--dark\">7.4<\/div>\n              <div class=\"ols-t7-spec-mob-text\">be able to predict the presence of hydrogen bonding in molecules analogous to those mentioned in 7.2<\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--mid\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--mid\">7.5<\/div>\n              <div class=\"ols-t7-spec-mob-text\">\n                <div style=\"margin:0 0 10px;\">understand, in terms of intermolecular forces, physical properties shown by substances, including:<\/div>\n                <div class=\"ols-t7-spec-mob-sub-list\">\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">the trends in boiling temperatures of alkanes with increasing chain length<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">the effect of branching in the carbon chain on the boiling temperatures of alkanes<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">the relatively low volatility (higher boiling temperatures) of alcohols compared to alkanes with a similar number of electrons<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">iv<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">the trends in boiling temperatures of the hydrogen halides HF to HI<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n            <div class=\"ols-t7-spec-mob-row ols-t7-spec-mob-row--mid\">\n              <div class=\"ols-t7-spec-mob-code ols-t7-spec-mob-code--mid\">7.6<\/div>\n              <div class=\"ols-t7-spec-mob-text\">\n                <div style=\"margin:0 0 10px;\">understand factors that influence the choice of solvents, including:<\/div>\n                <div class=\"ols-t7-spec-mob-sub-list\">\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">i<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">water, to dissolve some ionic compounds, in terms of the hydration of the ions<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">ii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">water, to dissolve simple alcohols, in terms of hydrogen bonding<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">iii<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">water, as a poor solvent for compounds (to include polar molecules such as halogenoalkane), in terms of inability to form hydrogen bonds<\/div>\n                  <\/div>\n                  <div class=\"ols-t7-spec-mob-sub-row\">\n                    <div class=\"ols-t7-spec-mob-sub-code\">iv<\/div>\n                    <div class=\"ols-t7-spec-mob-sub-text\">non-aqueous solvents, for compounds that have similar intermolecular forces to those in the solvent<\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n\n          <\/div>\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/section>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n 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