Chapter 16, Problem 14QAP

Predict the sign of ΔS° for each of the following reactions.

(a) ${\text{H}}_2\left(g\right)+{\text{Ni}}^{2+}\left(aq\right)\to {\text{2H}}^{+}\left(aq\right)+\text{Ni}\left(s\right)$(b) $\text{Cu}\left(s\right)+{\text{2H}}^{+}\left(aq\right)\to {\text{H}}_2\left(g\right)+{\text{Cu}}^{2+}\left(aq\right)$

(c) ${\text{N}}_2{\text{O}}_4\left(g\right)\to 2{\text{NO}}_2\left(g\right)$