(3) A fuel cell is designed to produce electricity via a combustion reaction, us
ID: 911901 • Letter: #
Question
(3) A fuel cell is designed to produce electricity via a combustion reaction, usually with oxygen. Potential fuels include hydrogen, ammonia, and alcohols, like methanol. The products of the complete combustion with oxygen will give carbon dioxide, water vapor, and nitrogen gas, in the case of ammonia.
(a) Write the balanced combustion reactions of methanol and ammonia with oxygen that could be used to operate a fuel cell (one reaction for methanol, one reaction for ammonia).
(b) For each reaction in part (a), write the half-reactions corresponding to reduction and oxidation (you may assume standard acidic conditions, which may be impractical in actual usage).
(c) (4 pts) From your equations in part (a), evaluate change in G(kJ/mole of fuel) and change in E(V) at 298.15 K
Explanation / Answer
Answer:-
a) Reaction of methanol:-
2CH3OH(l) + 3O2(g) 2CO2(g) + 4H2O(g)
4NH3+ 5O2 -------> 4NO + 6H2O
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