CAIE A-Level Chemistry AS 8.2.3 In Terms Both of the Boltzmann Distribution Questions

Practise linking Boltzmann energy distributions, activation energy and successful collisions to temperature-dependent reaction rates using CAIE 9701 AS questions.

Exam points

Explain, using Boltzmann distributions and collision theory, why increasing temperature increases the rate of reaction.

[Maximum number: 1]

The diagram shows the Boltzmann distribution for one mole of a gas. The gas takes part in a reaction with an activation energy, $E_{a}$ .

Figure for Question CAIE A-Level Chemistry AS 8.2.3 In Terms Both of the Boltzmann Distribution Questions question 1 — CAIE A-Level Chemistry AS

Which statement correctly describes the effect of an increase in temperature?

Peak P will be higher and fewer molecules will have energy $>E_{\mathrm{a}}$ .

Peak P will be higher and more molecules will have energy $>E_{\mathrm{a}}$ .

Peak P will be lower and fewer molecules will have energy $>E_{\mathrm{a}}$ .

Peak P will be lower and more molecules will have energy $>E_{\mathrm{a}}$ .

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CAIE A-Level Chemistry AS 8.2.3 In Terms Both of the Boltzmann Distribution Questions question 1