In a fuel cell, methanol if used as fuel and oxygen gas is used as an oxidiser. The reaction is
Channel: Doubtnut
Date: 2020-07-26

In a fuel cell, methanol if used as fuel and oxygen gas is used as an oxidiser. The reaction is  `CH_(3)OH(l) +(3)/(2)O_(2)(g)rarrCO_(2)(g)+2H_(2)O(l)`  Calculated standard Gibbs free enegry change for the reaction that can be converted into electircal work. If standard enthalpy of combustion for methanol is `-702 kJ mol^(-1)`, calculate the efficiency of converstion of Gibbs energy into useful work.  `Delta_(f)G^(Theta)` for `CO_(2),H_(2)O, CH_(3)OH,O_(2)` is `-394.00, -237.00,-166.00`and `0 kJ mol^(-1)` respectively.