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6.3 Dynamic equilibria

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Question 8
H

A sealed container holds only ammonia gas. It is kept at 450 ∘C450\,^\circ\mathrm{C}450∘C and 200 atm with an iron catalyst. N2(g)+3H2(g)⇌2NH3(g)\mathrm{N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g)}N2​(g)+3H2​(g)⇌2NH3​(g)

Which statement describes what happens?

[1]
A

The ammonia does not react, because the reaction only goes in the direction written

B

All the ammonia decomposes, because at first only the reverse reaction can happen

C

Some ammonia decomposes until the rates of decomposition and formation are equal

D

Ammonia decomposes until the amounts of nitrogen, hydrogen and ammonia are equal

Markscheme

6.3 Dynamic equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Dynamic equilibria

43 exam-style questions on Edexcel GCSE Chemistry 6.3 Dynamic equilibria, covering 6.3.1 The Haber process as a reversible reaction, 6.3.2 Conditions and rate in industrial equilibria, and 6.3.3 Fertilisers and the preparation of ammonium sulfate. Each one has a worked solution and a mark scheme showing where the marks go.

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