A-LevelChemistryReaction kinetics9701/12 · Feb/Mar 2019 · Q11 Mark

The Boltzmann distribution is shown for a sample of gas at an initial temperature, T1. [Figure 1.1] The sample of gas was heated to temperature, T2. What is the correct distribution for the higher temperature, T2?

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ABoltzmann distribution curve for T2 showing a higher peak shifted to the left compared to T1.

BBoltzmann distribution curve for T2 showing a lower peak shifted to the right compared to T1.

CBoltzmann distribution curve for T2 showing a very high peak shifted to the left compared to T1.

DBoltzmann distribution curve for T2 showing a higher peak shifted to the right compared to T1.

✓ Correct answer

B: Boltzmann distribution curve for T2 showing a lower peak shifted to the right compared to T1.

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2019 Paper 1 Variant 2, question 1.

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