Electrochemistry Ques 59
59. The efficiency of a fuel cell is determined by [2007]
(a) $\frac{\Delta G}{\Delta S}$
(b) $\frac{\Delta G}{\Delta H}$
(c) $\frac{\Delta G}{\Delta T}$
(d) $\frac{\Delta H}{\Delta G}$
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Solution:
(b) Efficacy of a fuel cell $(\eta)=\frac{\Delta G}{\Delta G^{\circ}}$
$\Delta H$ is the total energy change (input) and $\Delta G$ is the usable energy obtained (output).
BETA
