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CAIE A-Level Chemistry AS 7.1.9 Whether Changes in Temperature Concentration Questions

Practise predicting equilibrium-position and Kc/Kp effects when temperature, concentration or pressure changes using CAIE 9701 AS questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Predict how temperature, concentration and pressure changes affect equilibrium position and equilibrium constants.

CAIE A-Level Chemistry AS 7.1.9 Whether Changes in Temperature Concentration Questions question 1

[Maximum number: 1]

Sulfur dioxide reacts with oxygen as shown.

2SO2( g)+O2( g)⇌2SO3( g)ΔH⊖=−197 kJ mol−12 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g}) \quad \Delta H^{\ominus}=-197 \mathrm{~kJ} \mathrm{~mol}^{-1}

Which change will move the equilibrium position to the right side and change the value of the equilibrium constant, KcK_{\mathrm{c}} ?

A

the addition of a catalyst

B

increasing the pressure of the reaction

C

decreasing the temperature of the reaction

D

decreasing the concentration of product

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