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5.2 Reversible reactions and equilibria

5.2 Reversible reactions and equilibria

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Question 1

The equation for this gas-phase equilibrium reaction is:

C2H6(g)⇌C2H4(g)+H2(g)ethaneethene \begin{array}{c} \text{C}_2\text{H}_6(\text{g}) \rightleftharpoons \text{C}_2\text{H}_4(\text{g}) + \text{H}_2(\text{g}) \\ \text{ethane} \qquad \text{ethene} \end{array} C2​H6​(g)⇌C2​H4​(g)+H2​(g)ethaneethene​

The forward reaction is endothermic.

A chemical manufacturer wants to produce large quantities of ethene economically.

Suggest, with explanations, the conditions of temperature, pressure, and the use of a catalyst that the manufacturer should choose to achieve an optimum balance between the rate of reaction and the yield of ethene.

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Markscheme

5.2 Reversible reactions and equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.2 Reversible reactions and equilibria

38 exam-style questions on Edexcel GCSE Chemistry 5.2 Reversible reactions and equilibria, covering 5.2.1 Reversible reactions and dynamic equilibrium, 5.2.2 The Haber process, and 5.2.3 Changing the position of a dynamic equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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