An off-grid telecommunication tower relies on a hydrogen-oxygen fuel cell for backup power. The total electrical energy required to keep the tower fully operational during a 48-hour power outage is 115.2 megajoules (MJ).
The energy released when 1 mole of hydrogen gas reacts with oxygen in the fuel cell is 288 kJ.
The volume of 1 mole of a gas at room temperature and pressure is 24 dm3\text{dm}^3dm3.
Calculate the volume of hydrogen gas, in dm3\text{dm}^3dm3, at room temperature and pressure needed to run the backup power system for the 48-hour outage.
Practise AQA GCSE Chemistry Chemical cells and fuel cells (chemistry only) with exam-style questions for Foundation and Higher tier. 20 questions covering Cells and batteries and Fuel cells, matched to the AQA GCSE Chemistry (8462) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.