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5.3 Equilibria

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Question 81
H

Ethanol is made by reacting ethene with steam.

C2H4(g)+H2O(g)⇌C2H5OH(g) \mathrm{C_{2}H_{4}(g) + H_{2}O(g) \rightleftharpoons C_{2}H_{5}OH(g)} C2​H4​(g)+H2​O(g)⇌C2​H5​OH(g)

The forward reaction is exothermic. The temperature of the equilibrium mixture is increased and the pressure is kept the same.

What happens to the yield of ethanol?

[1]
A

It decreases, because the position moves in the endothermic direction.

B

It increases, because the position moves in the endothermic direction.

C

It increases, because the particles collide more often and faster.

D

It stays the same, because the mixture is already at equilibrium.

Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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