Chemistry - Electrochemistry Question with Solution | TestHub

${\text{Fe}}^{\text{2+}}{\text{+2e}}^{-}\to \text{Fe;}{\text{ΔG}}_{\text{1}}\text{=}-\text{2F}\left(-\text{0}\text{.44}\right)\left(\text{A}\right){\text{=ZaCO}}_{\text{3}}{\text{=FeCO}}_{\text{3}}$
${\text{Fe}}^{\text{3+}}{\text{+e}}^{-}\to {\text{Fe}}^{\text{2+}}\text{;}{\text{ΔG}}_{\text{2}}\text{=}-\text{F}\left(\text{0}\text{.77}\right)$
So,
${\text{Fe}}^{\text{3+}}{\text{+3e}}^{-}\to \text{Fe;}\text{ΔG}\text{=}-\text{3F(E)}\text{=}{\text{ΔG}}_{\text{1}}{\text{+ΔG}}_{\text{2}}$
$\mathrm{E}=-0.0367\mathrm{ }\mathrm{V}$