Reaction quotient Q and direction of change

The gas-phase decomposition below has reached equilibrium in a sealed vessel: $\ce{PCl5(g) <=> PCl3(g) + Cl2(g)}$ $\Delta H^\ominus = +88\ \mathrm{kJ\,mol^{-1}}$ The pressure is then changed. Which row pairs the change correctly with the direction in which the…

(i) To check the value of $K$ found in (d)(viii), a student set up an experiment: 0.500 mol each of propan-1-ol and ethanoic acid were mixed with a small amount of concentrated sulfuric acid at 25 °C, and the mixture's volume was kept constant throughout.…

Sulfur dioxide and oxygen react reversibly: $\ce{2SO2(g) + O2(g) <=> 2SO3(g)}$ At a certain temperature the equilibrium constant is $K = 4.0$. A mixture at this temperature has the following concentrations, in $\mathrm{mol\,dm^{-3}}$: $[\ce{SO2}] = 0.50$,…

A reaction mixture is moving towards equilibrium, and the forward reaction is proceeding faster than the reverse reaction. Which statement is correct? A. $Q > K$ and $\Delta G > 0$ B. $Q < K$ and $\Delta G < 0$ C. $Q$ decreases towards zero while $K$ remains…