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6.2 Reversible reactions and dynamic equilibrium

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Question 18

Dinitrogen tetroxide breaks down into nitrogen dioxide in a reversible reaction. The forward reaction is endothermic.

N2O4(g)⇌2NO2(g)\text{N}_2\text{O}_4\text{(g)} \rightleftharpoons 2\text{NO}_2\text{(g)}N2​O4​(g)⇌2NO2​(g)

Two samples of the same mixture were allowed to reach equilibrium in sealed containers at the same pressure but at different temperatures.

Temperature in ∘C^\circ\text{C}∘CPercentage of nitrogen dioxide in the equilibrium mixture
2532
5060
a.

Describe the effect of the higher temperature on the percentage of nitrogen dioxide in the equilibrium mixture.

[1]
b.

Explain why the higher temperature has this effect.

[2]
Markscheme

6.2 Reversible reactions and dynamic equilibrium Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Reversible reactions and dynamic equilibrium

109 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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