Ammonium nitrate is made from ammonia and nitric acid both in a school laboratory and in industry. Unlike the laboratory method, the industrial process puts the heat released by the reaction to use. Which statement describes how this heat is used?
The heat evaporates water, helping to concentrate the ammonium nitrate product
The heat lowers the activation energy, allowing ammonium nitrate to form more quickly
The heat keeps the iron catalyst hot enough to speed up the neutralisation
The heat increases the equilibrium yield, producing more ammonium nitrate in each pass
71 exam-style questions on AQA GCSE Chemistry 10.4 The Haber process and the use of NPK fertilisers, covering 10.4.1a The Haber process, 10.4.1b Equilibrium and rate in the Haber process, and 10.4.2 Production and uses of NPK fertilisers. Each one has a worked solution and a mark scheme showing where the marks go.