
(Given, $\frac{\mathrm{d}(\ln K)}{\mathrm{d}\left(\frac{1}{T}\right)}=-\frac{\Delta H^{\theta}}{R}$, where the equilibrium constant, $K=\frac{p_{z}}{p^{\theta}}$ and the gas constant, $\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$ )
The value of standard enthalpy, (in ) for the given reaction is ___.