A-LevelChemistryReaction kinetics9701/12 · May/June 2016 · Q11 Mark

The diagram shows the Boltzmann distribution of energies in 1 mole of a gas. The gas can take part in a reaction with an activation energy, Ea. [Figure depicting Boltzmann distribution] Which statement correctly describes the effect of an increase in temperature?

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APeak P will be higher and fewer molecules will have energy > Ea.

BPeak P will be higher and more molecules will have energy > Ea.

CPeak P will be lower and fewer molecules will have energy > Ea.

DPeak P will be lower and more molecules will have energy > Ea.

✓ Correct answer

D: Peak P will be lower and more molecules will have energy > Ea.

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 1.

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