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Question 15

The steam reforming of methane is an industrial process used to produce hydrogen gas:

CH4(g)+H2O(g)⇌CO(g)+3H2(g)ΔH=+206 kJ mol−1 \text{CH}_4(\text{g}) + \text{H}_2\text{O}(\text{g}) \rightleftharpoons \text{CO}(\text{g}) + 3\text{H}_2(\text{g}) \quad \Delta H = +206\text{ kJ mol}^{-1} CH4​(g)+H2​O(g)⇌CO(g)+3H2​(g)ΔH=+206 kJ mol−1

Which change in conditions will increase the equilibrium yield of hydrogen, H2(g)\text{H}_2(\text{g})H2​(g)?

A

Increasing the pressure

B

Decreasing the concentration of methane, CH4(g)\text{CH}_4(\text{g})CH4​(g)

C

Decreasing the temperature

D

Decreasing the pressure

Markscheme

Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /Equilibria

25 exam-style questions on OCR GCSE Chemistry Equilibria. Each one has a worked solution and a mark scheme showing where the marks go.

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