An emergency communication mast is set up in an area without mains electricity. Nobody can visit the mast for 18 days. Engineers compare two power sources that could be installed, fully supplied, before the mast is left. The results are shown in the table.
| Power source | Time the mast can operate before the power source stops |
|---|---|
| Hydrogen fuel cell | 6 days |
| Rechargeable battery | 21 days |
Explain why the rechargeable battery may be more suitable for this communication mast than the hydrogen fuel cell.
90 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries, 5.2.2a Fuel cells, and 5.2.2b Half equations for hydrogen fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.