From the given standard electrode potentials array ll Sn^ 4+ (aq)+2...

From the given standard electrode potentials $$\begin{array}{ll}\mathrm{Sn}^{4+}(\mathrm{aq})+2 \mathrme^{-} \rightarrow \mathrm{Sn}^{2+}(\mathrm{aq}) & \mathrm{E}^0=0.15 \mathrm{~V} \\ \mathrm{Br}_2(\mathrm{l})+2 \mathrme^{-} \rightarrow 2 \mathrm{Br}^{-}(\mathrm{aq}) & \mathrm{E}^0=1.07 \mathrm{~V}\end{array}$$The approximate free energy change for the process $2$\mathrm{Br}^{-}(\mathrm{aq})+\mathrm{Sn}^{4+}(\mathrm{aq}) \rightarrow \mathrm{Br}}_{2}( \mathrm{l})+\mathrm{Sn}^{2+}(\mathrm{aq})$is