CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
Consider the equilibrium 2SO2(g)+O2(g)⇌2SO3(g) with ΔH∘=−197kJmol−1. An equilibrium mixture at 700 K is simultaneously heated to 900 K and supplemented with additional SO2. Immediately after these changes, predict the net direction in which the reaction will shift (toward reactants, toward products, or no net change). Support your prediction by discussing (a) how K is affected by the temperature change and (b) how Q compares with the new K after the addition.