Chapter 19, Problem 122AP

Interpretation Introduction

Interpretation:

The number ofmoles of $\text{cyt c}\left({\text{Fe}}^{3+}\right)$ formed from $\text{cyt c}\left({\text{Fe}}^{2+}\right)$ is to be calculated.

Concept introduction:

The standard free energy change of the reaction is the difference of the sum of the standard free energy change of the products and the sum of the standard free energy change of the reactants.

$\Delta {\mathit{\text{G}}}_{rxn}^{\circ }\text{=}{\displaystyle \sum \Delta {\mathit{\text{G}}}_{product}^{\circ }}-{\displaystyle \sum \Delta {\mathit{\text{G}}}_{reac\tan t}^{\circ }}$

The relation between the cell potential and the free energy change is as follows:

$\Delta G°\text{=}-n\text{F}{E}_{cell}^{\circ }$

Here, $E_{cell}^{\circ }$ is the standard cell potential, $\Delta G^{\circ }$ is the standard Gibb’s free energy change, $\text{F}$ is the Faraday constant $\left(\text{1F = 96500 J/V }{\text{. mol e}}^{-}\right)$, and $n$ is the transfer of electrons in the half-cell reactions.