3.1.5
Kinetics
Section 3.1.5 covers collision theory and activation energy, the Maxwell-Boltzmann distribution and its use to explain the effects of temperature and of a catalyst, the meaning of rate and the qualitative effects of concentration and pressure, and how catalysts work. The measuring page supports required practical 3 (initial rate by a clock method).
Revision Notes
Work through 3.1.5 Kinetics in a structured sequence.
Reaction
Collision Theory and Rates of Reaction
Collision theory: rate of reaction, activation energy, effective collisions and the effects of concentration, pressure, surface area and temperature.
Start revisingRates
Measuring and Calculating Rates
Measuring rates: mass, gas volume and clock methods, rate = 1/time, tangents and initial rate on concentration–time graphs.
Start revisingBoltzmann
The Maxwell–Boltzmann Distribution
The Maxwell–Boltzmann distribution: shape, activation energy, the effect of temperature and the effect of a catalyst on the proportion of molecules that can react.
Start revisingCatalysts and Reaction Profiles
Catalysts: lower activation energy, reaction profiles with the intermediate, homogeneous and heterogeneous catalysis, and the economic and environmental benefits.
Start revising3.1.5 Kinetics – AQA A Level Chemistry
The following AQA specification points outline the knowledge and skills students are expected to demonstrate. Wording follows the AQA A Level Chemistry (7405) specification.
3.1.5 Kinetics
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