• # question_answer If $\Delta G=\Delta H-T\,\,\Delta S$and $\Delta G=\Delta H+T\,\,{{\left[ \frac{d(\Delta G)}{dT} \right]}_{P}},$ then variation of EMF of a cell E, with temperature T, is given by A) $\frac{\Delta H}{nF}$                                   B)  $\frac{\Delta G}{nF}$ C) $\frac{\Delta S}{nF}$                                    D)  $\frac{-\Delta S}{nF}$

By compariosn we get $\Delta S=\frac{-d(\Delta G)}{dT}$ By substituding $\Delta G=-nFE$ and rearranging we get$\frac{dE}{dT}=\frac{\Delta S}{nF}$