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4.2. Hydrogen–oxygen fuel cells
A subsection of Chemistry, 0620, through 4. Electrochemistry
Listing 10 of 51 questions
Fuel cells are used in spacecraft to produce electrical energy. hydrogen oxygen anode electrolyte cathode How is oxygen obtained from liquid air? Hydrogen and oxygen react to form water. 2H2 + O2 → 2H2O Give an example of bond breaking in the above reaction. Give an example of bond forming in the above reaction. Is the change given in exothermic or endothermic? Give two reasons why hydrogen may be considered to be the ideal fuel for the future. Suggest a reason why hydrogen is not widely used at the moment.
0620_s10_qp_32
THEORY
2010
Paper 3, Variant 2
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Questions Discovered
51