1. what is the value of the equilibrium constant at $\displaystyle 200^oC$ for the decomposition of phosporus pentachloride gas to phosphorus trichloride gas and chlorine gas? At equilibrium,

$\displaystyle [PCL_{3(g)}]=[CL_{2(g)}]=0.014 mol/L$

$\displaystyle [PCL_{5(g)}] = 4.3*10^{-4} mol/L$

4. In the haber process of synthesizing ammonia, the value of K is $\displaystyle 8.00 * 10^{-7}$ for the reaction at $\displaystyle 400^oC$. In a sealed container at equilibrium at $\displaystyle 400^oC$ the concentations of $\displaystyle H_{2(g)}$ and $\displaystyle N_{2(g)}$ are measured to be 0.50 mol/L and 1.50mol/L respectively. Write the equilibrium constant equation and calculate the equilibreum concentration of $\displaystyle NH_{3(g}$)