A-LevelChemistryReaction kinetics9701/12 · May/June 2011 · Q61 Mark

The Boltzmann distribution for a gas at constant temperature is shown below. [Figure 6.1] If the temperature of the gas is reduced by 10°C the graph changes shape. What happens to the values of n for the points marked X, Y and Z?

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AX: higher, Y: lower, Z: higher

BX: higher, Y: lower, Z: lower

CX: lower, Y: higher, Z: lower

DX: lower, Y: lower, Z: lower

✓ Correct answer

B: X: higher, Y: lower, Z: lower

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2011 Paper 1 Variant 2, question 6.

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