Answer
(a)
$CH_3OH(g)$ concentration increases, $CH_3OH(l)$ is a liquid, so its concentration is constant.
(b)
$HCN$ and $H_2$ concentrations increase and $CH_4$ and $NH_3$ concentrations decrease.
Work Step by Step
Increasing the volume of the container shifts the equilibrium toward the side with more moles of gas.
(a) Reactants: 0 moles of gas; Products: 1 mol of gas.
Products are favored.
$CH_3OH(g)$ concentration increases, $CH_3OH(l)$ is a liquid, so its concentration is constant.
(b) Reactants: 2 moles of gas; Products: 4 moles of gas.
Products are favored.
$HCN$ and $H_2$ concentrations increase and $CH_4$ and $NH_3$ concentrations decrease.
