Chapter 19, Problem 87AP

Given that:

$\begin{array}{l}2{\text{Hg}}^{\text{2+}}(aq)+2^{z-}\to {\text{Hg}}_{\text{2}}^{\text{2+}}(aq)E°=0.92\text{v}\\ {\text{Hg}}_2^{2+}(aq)+2e^{-}\to 2\text{Hg(}l\text{) }E°=0.85\text{v}\end{array}$

calculate $\Delta G°$ and K for the following process at $25°\text{C:}$:

${\text{Hg}}_2^{2+}(aq)\to {\text{Hg}}^{\text{2+}}\text{(}aq\text{)}+\text{Hg}(l)$

(The preceding reaction is an example of a disproportionation reaction in which an element in one oxidation state is both oxidized and reduced.)