A-LevelChemistryReaction kinetics9701/12 · May/June 2025 · Q31 Mark

The diagram shows a Boltzmann distribution of molecular energies for a gaseous reaction at two different temperatures and two different activation energies. [Figure showing Boltzmann distribution with T1, T2, EA(1), EA(2)] Which combination of temperature and activation energy will give the highest reaction rate?

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AT₁ and EA(1)

BT₁ and EA(2)

CT2 and EA(2)

DT2 and EA(1)

✓ Correct answer

D: T2 and EA(1)

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 3.

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