An autonomous deep-sea research vessel relies on a proton-exchange membrane (PEM) fuel cell for its propulsion and scientific instruments. To complete a planned 72-hour deep-ocean survey, the vessel requires a total energy of 108 MJ108\text{ MJ}108 MJ.
The useful electrical energy obtained from the electrochemical reaction of 1 mole of hydrogen gas with oxygen in this fuel cell system is 240 kJ.
The volume of 1 mole of any gas at room temperature and pressure (RTP) is 24.0 dm3.
Calculate the volume of hydrogen gas, measured at RTP, that must be stored in the vessel's tanks to guarantee the completion of the 72-hour survey.
6 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries and 5.2.2 Fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.