Chapter 3, Problem 3.59E

Determine the differences in the ${\Delta }_{\text{rxn}}S$ under standard conditions for the two following reactions:

$\begin{array}{c}{\text{H}}_{\text{2}}\left(\text{g}\right)+\frac{1}{2}{\text{O}}_2\left(\text{g}\right)\to {\text{H}}_{\text{2}}\text{O}\left(l\right)\\ {\text{H}}_{\text{2}}\left(\text{g}\right)+\frac{1}{2}{\text{O}}_2\left(\text{g}\right)\to {\text{H}}_{\text{2}}\text{O}\left(\text{g}\right)\end{array}$

and justify the difference.