53. In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is CH,OH,9 +0268) + CO2(8) +2H,0At 298K standard Gibb's energies of formation for CH,OH (1)H,0(1)and CO2(g) are -166.2, -237.2 and -394.4kJ mol-' respectively. If standard enthalpy of combustion of methanol is -726kJ mol“!, efficiency of the fuel cell will be AIEEE2009) 2) 87% 3) 90% 4) 97% 2007

In a fuel cell methanol is used as fuel and oxygen is used as an oxidiser. The reaction is : CH_(3)OH(l)+(3)/(2)O_(2)(g)rarr CO_(2)(g)+2H_(2)O(l) At 298 K, standard Gibb's energies of formation for CH_(3)OH(l), H_(2)O(l) and CO_(2)(g) are -166.2, - 237.2 and -394.4 kJ/mol respectively. If standard enthalpy of combustion of methanol is - 726 kJ/mol, effeciency of the fuel cell will be :

In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is : CH_(3)OH_((l))+(3)/(2)O_(2(g))rarr CO_2((g))+2H_(2)O_((l)) At 298K standard Gibb's energies of formation for CH_(3)OH(l), H_(2)O(l) and CO_(2)(g) are -166.2,-237.2 and -394.4kJ mol^(-1) respectively. If standard enthalpy of combustion of methanol is -726kJ mol^(-1) , efficiency of the fuel cell will be :

In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is : CH_(3)OH_((l))+(3)/(2)O_(2(g))rarr CO_2((g))+2H_(2)O_((l)) At 298K standard Gibb's energies of formation for CH_(3)OH(l), H_(2)O(l) and CO_(2)(g) are -166.2,-237.2 and -394.4kJ mol^(-1) respectively. If standard enthalpy of combustion of methanol is -726kJ mol^(-1) , efficiency of the fuel cell will be :