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CAIE A-Level Chemistry AS 8.2.2 Sketch and Use the Boltzmann Distribution Questions

Practise sketching Boltzmann distributions and explaining temperature, activation energy and the proportion of molecules able to react using CAIE 9701 AS questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Sketch and use Boltzmann distributions to show the effect of temperature and activation energy on the proportion of molecules able to react.

CAIE A-Level Chemistry AS 8.2.2 Sketch and Use the Boltzmann Distribution Questions question 1

[Maximum number: 1]

The diagram shows the Boltzmann distribution of the energy of gaseous molecules at a particular temperature.

Figure for Question CAIE A-Level Chemistry AS 8.2.2 Sketch and Use the Boltzmann Distribution Questions question 1 — CAIE A-Level Chemistry AS

Which statement is correct?

A

If the temperature of the gas is raised, the height of the maximum of the curve increases.

B

If the temperature of the gas is raised, the maximum of the curve moves to the right.

C

The length of the line labelled X shows the activation energy for the reaction.

D

The length of the line labelled Y shows the enthalpy change of the reaction.

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