Engineers tested the production of ammonia in a pilot reactor. The same amounts of nitrogen and hydrogen were used at the same temperature and pressure in each trial.
| Trial | Mass of iron placed in the reactor in kg | Time taken to produce 10.0 kg of ammonia in minutes | Mass of iron recovered in kg |
|---|---|---|---|
| 1 | 0.0 | 150 | 0.0 |
| 2 | 25.0 | 24 | 25.0 |
Describe what the results show about the function of the iron.
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.