Calculate $\Delta S^{\circ}$ for the reaction $3 \mathrm{H}_2(g)+\mathrm{N}_2(g) \rightarrow$ $2 \mathrm{NH}_3(g)$ at $725 \mathrm{~K}$. Omit terms in the temperature-dependent heat capacities higher than $T^2 / \mathrm{K}^2$.
-191.2