Chapter 18, Problem 26E

Calculate $E_{\text{cell}}^{°}$ for each balanced redox reaction and determine whether the reaction is spontaneous as written.

a. ${\text{O}}_{\text{2}}\left(g\right)+{\text{2H}}_{\text{2}}\text{O}\left(l\right)+\text{4Ag}\left(s\right)\to {\text{4OH}}^{-}\left(aq\right)+{\text{4Ag}}^{+}\left(aq\right)$

b. ${\text{Br}}_{\text{2}}\left(l\right)+{\text{2 I}}^{-}\left(aq\right)\to {\text{2Br}}^{-}\left(aq\right)+{\text{I}}_{\text{2}}\left(s\right)$

C. ${\text{PbO}}_{\text{2}}\left(s\right)+{\text{4H}}^{+}\left(aq\right)+\text{Sn}\left(s\right)\to {\text{Pb}}^{\text{2}+}\left(aq\right)+{\text{2H}}_{\text{2}}\text{O}\left(l\right)+{\text{Sn}}^{\text{2}+}\left(aq\right)$