Chemistry - Thermodynamics - II Question with Solution | TestHub

Spontaneity of cell indicates that the oxidation-reduction reaction is a spontaneous reaction for reduction at the cathode and oxidation at anode. For this$\mathrm{\Delta }\mathrm{G}$must be negative.

$\mathrm{\Delta }\mathrm{G}=\mathrm{\Delta }\mathrm{H}-\mathrm{T}\mathrm{\Delta }\mathrm{S}$;$\mathrm{\Delta }\mathrm{G}=\mathrm{\Delta }\mathrm{E}+\mathrm{P}\mathrm{\Delta }\mathrm{V}-\mathrm{T}\mathrm{\Delta }\mathrm{S}$

For spontaneity$\left(\mathrm{\Delta }\mathrm{G}=-\mathrm{v}\mathrm{e}\right)$

$\because \mathrm{\Delta }\mathrm{G}=-\mathrm{v}\mathrm{e}$,$\mathrm{\Delta }\mathrm{E}\text{=+}\mathrm{v}\mathrm{e}$