Chapter 19.4, Problem 2CP

Calculate $\Delta G°\text{ at }25°\text{C}$ for the following reaction:

${\text{3Cu}}^{\text{2+}}\text{(}aq\text{)+ Cr}\left(s\right)\underset{}{\rightleftarrows }{\text{ 3Cu}}^{\text{+}}\left(aq\right){\text{+ Cr}}^{\text{3+}}\left(aq\right)$

$\begin{array}{l}\text{a)}\hfill \\ \text{2}\text{.6 }\times {\text{ 10}}^{\text{2}}\text{kJ/mol}\hfill \\ \text{b)}\hfill \\ \text{-2}\text{.6 }\times {\text{ 10}}^{\text{2}}\text{kJ/mol}\hfill \\ \text{c)}\hfill \\ \text{1 }\times {\text{ 10}}^{\text{45}}\text{kJ/mol}\hfill \\ \text{d)}\hfill \\ \text{-86 kJ/mol}\hfill \\ \text{e)}\hfill \\ \text{86 kJ/mol}\hfill \end{array}$