Chapter 16, Problem 58QAP

For the reaction

$2{\text{H}}_2\text{O}\left(l\right)+2{\text{Br}}^{-}\left(aq\right)\to {\text{H}}_2\left(g\right)+{\text{Br}}_2\left(l\right)+2{\text{OH}}^{-}\left(aq\right)$

(a) calculate ΔG° at 25°C.

(b) calculate ΔG° at 25°C when $P_{{\text{H}}_2}=0.878$atm, $\left[{\text{Br}}^{-}\right]=0.423M$, and the pH of the solution is 9.72.