CAIE A Level Chemistry 9701 · Reaction kinetics

Reaction kinetics: describe question

Describe7 marksChallenge

The activation energy, EAE_\mathrm{A}, for a reaction is 50 kJ mol−1\pu{50 kJ mol^{-1}}.

Describe, in terms of the Boltzmann distribution and the frequency of effective collisions, how an increase in temperature increases the rate of this reaction. In your answer, define activation energy.

0 words · 7 marks

No account needed for your first marks. Your answer is used only to mark it.

How this question is marked

7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.

Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.

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