Answer
(a) $F$ concentration increases and $F_2$ concentration decreases.
(b) $C_2H_2$ and $H_2$ concentrations increase and $CH_4$ concentration decreases.
Work Step by Step
Increasing the volume of the container shifts the equilibrium toward the side with more moles of gas.
(a) Reactants: 1 mol of gas; Products: 2 moles of gas.
Products are favored.
$F(g)$ concentration increases and $F_2(g)$ concentration decreases.
(b) Reactants: 2 moles of gas; Products: 4 moles of gas.
Products are favored.
$C_2H_2$ and $H_2$ concentrations increase and $CH_4$ concentration decreases.
