Consider the reaction $\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_2(\mathrm{~g})$. The temperature at which $\mathrm{KC}=20.4$ and $\mathrm{K}_{\mathrm{P}}=600.1$, is $\_\_\_\_$ K. (Round off to the Nearest Integer)| [Assume all gases are ideal and $\mathrm{R}=0.0831 \mathrm{~L} \mathrm{bar} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ ]