Chapter 19, Problem 101E

Consider the reaction that occurs during the Haber process:

   ${\text{N}}_2\text{(}g)+{\text{ 3H}}_{\text{2}}\left(g\right)\to {\text{ 2NH}}_{\text{3}}\left(g\right)$

The equilibrium constant is $3.9\times {10}^5$ at 300 K and $1.2\times {10}^{-1}$ at 500 K. Calculate $\Delta H_{\text{rxn}}^{°}$ and $\Delta S_{\text{rxn}}^{°}$ for this reaction.