An ammonia plant normally runs at 450 ∘C450\,^\circ\mathrm{C}450∘C and 200 atm200\,\mathrm{atm}200atm with an iron catalyst. The temperature is lowered to 400 ∘C400\,^\circ\mathrm{C}400∘C, the pressure is kept at 200 atm200\,\mathrm{atm}200atm, and the catalyst stops working because it has been poisoned. Compared with normal running, which is correct?
Equilibrium is reached more quickly, and the equilibrium yield of ammonia is higher
Equilibrium is reached more slowly, and the equilibrium yield of ammonia is lower
Equilibrium is reached more slowly, and the equilibrium yield of ammonia is unchanged
Equilibrium is reached more slowly, and the equilibrium yield of ammonia is higher
45 exam-style questions on Edexcel GCSE Chemistry 5.2 Reversible reactions and equilibria, covering 5.2.1 Reversible reactions and dynamic equilibrium, 5.2.2 The Haber process, and 5.2.3 Changing the position of a dynamic equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.