$5$: Calculate $H,S$ and $G$ for the following reaction at $50,00C$

$N{a}_{2}C{O}_3(s)+C{O}_2(g)+H_{2}O(g),$longrightarrow,$\mathrm{.}2NaHC{O}_3(s)$

What is the equilibrium constant for the reaction at this temperature $(50\mathrm{.}00C)?$

At what temperature will the equilibrium constant be $0\mathrm{.}1000?$