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5.3 Equilibria

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Question 12
H
N2(g)+3H2(g)⇌2NH3(g) \mathrm{N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g)} N2​(g)+3H2​(g)⇌2NH3​(g)

The forward reaction is exothermic. The pressure of an equilibrium mixture is increased at constant temperature.

What happens to the position of equilibrium?

[1]
A

It moves to the left, because there are more molecules of gas on the left.

B

It moves to the right, because the forward reaction is exothermic.

C

It does not move, because only temperature changes the position.

D

It moves to the right, because there are fewer molecules of gas on the right.

Markscheme

5.3 Equilibria Questions

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

47 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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