Alkanes from Crude Oil
Use this landing page to move quickly between the main crude oil revision pages for Topic 4. Each card links to a focused page covering how crude oil is separated, how larger hydrocarbons are broken down, and how hydrocarbon structures can be rearranged for more useful fuels.
Choose an Alkanes from Crude Oil Page
Crude oil is a mixture of hydrocarbons. These pages separate the key ideas students need for Topic 4: how fractions are separated by boiling point, how long-chain hydrocarbons are cracked into more useful molecules, and how reforming changes molecular structure to improve fuel quality.
Key idea: Crude oil chemistry links physical separation, hydrocarbon chain length, boiling point, supply and demand, and the industrial production of more useful fuels and feedstocks.
Fractional Distillation
Revise how crude oil is separated into fractions using differences in boiling point and the temperature gradient in a fractionating column.
Cracking
Learn how larger alkanes are broken down into shorter-chain alkanes and alkenes to meet demand for more useful products.
Reforming
Review how straight-chain hydrocarbons can be converted into branched, cyclic or aromatic products that are more useful as fuels.
How to Use These Pages
Start with fractional distillation to secure how crude oil is separated into fractions. Then move to cracking to understand why long-chain hydrocarbons are converted into shorter molecules. Finish with reforming to compare how hydrocarbon structure can be rearranged rather than simply broken apart.
Exam focus: For each process, learn whether bonds are being broken, whether the process is physical or chemical, what conditions are needed, and why the products are more useful industrially.
Copyright notice: This revision page, including its written explanations, layout and teaching sequence, is produced for Online Learning System by Dr. Mohammed Al-Fatah. It is intended for student revision and may not be copied, redistributed or republished without permission.