Chapter 17, Problem 28E

Determine the overall reaction and its standard cell potential at 25 °C for these reactions. Is the reaction spontaneous at standard conditions? Assume the standard reduction for Br₂(l) is the same as for Br₂(aq)..

$\text{Pt}\left(s\right)|{\text{H}}_2\left(g\right)|{\text{H}}^{+}\left(aq\right)\Vert {\text{Br}}_2\left(aq\right),{\text{Br}}^{-}\left(aq\right)|\text{Pt}\left(s\right)$