If `Delta G = Delta H - T Delta S and Delta G = Delta H + T [ (d (Delta G ))/(dT)]_(p)` then variation of EMF of a cell, E, with temperature T, is given by,

Options

A. `(Delta H )/(nF)`
B. `(Delta G)/(nF) `
C. `(Delta S)/(nF)`
D. `- (Delta S)/(nF)`

Answer

C

Explanation

On conparison `Delta S =- [ (d(Delta G ))/( dT) ] , Delta S =- (d ( - n FE))/( dT) = nF ((dE)/(dT)) [{:("Here E is the "),("emf of cell"):}]therefore ((dE)/( dT)) = (Delta S )/(nF)`