A student makes three statements about the Haber process, N2(g)+3H2(g)⇌2NH3(g)\mathrm{N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g)}N2(g)+3H2(g)⇌2NH3(g), in which the forward reaction is exothermic.
Statement 1: raising the temperature shortens the time taken to reach equilibrium but lowers the equilibrium yield of ammonia
Statement 2: the iron catalyst speeds up the forward reaction more than the reverse reaction, so the equilibrium yield of ammonia increases
Statement 3: raising the pressure increases both the equilibrium yield of ammonia and the rate at which equilibrium is reached
Which statements are correct?
1 and 3 only
1 only
2 and 3 only
1, 2 and 3
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.