Chapter 19, Problem 105FP

Interpretation Introduction

Interpretation:

Without calculations, whether a reaction corresponding to a cell with a positive standard cell potential or not needs to be determined.

Concept introduction:

In the special case in which the reactants and products are in their standard states; the standard Gibbs energy change per mole of reaction is given by;

${\text{Δ}}_{\text{r}}{\text{G}}^{\text{0}}{\text{ = -zFE}}^{\text{0}}{}_{\text{cell}}$

${\text{Δ}}_{\text{r}}{\text{G}}^{\text{0}}$ and K were related through; ${\text{Δ}}_{\text{r}}{\text{G}}^{\text{0}}\text{ = -RTln K}$

${\text{E}}^{\text{0}}{}_{\text{cell}}\text{=}\frac{\text{RT}}{\text{zF}}\text{lnK}$

Here, R is Universal gas constant, T is temperature, z is number of electrons transferred, F is Faraday’s constant and K is equilibrium constant.