JEE Main 2009 Chemistry question
In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is At 298 K standard Gibb's energies of formation for , and are −166.2, −237.2 and −394.4 kJ respectively. If standard enthalpy of combustion of methanol is −726 kJ , efficiency of the fuel cell will be
Answer: (4)
Solution
kJ/mol. Efficiency $=
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