(a) A reaction A + B ⇄ C has a standard free-energy change of –2.93 kJ mol^–1 (–0.7 kcal mol^–1) at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.1 M, 0.2 M, and 0 M, respectively?

(b) Without making a calculation, tell in a qualitative sense how you would expect your answer for part (a) to change if the reaction has instead a standard free-energy change of +2.93 kJ mol^–1 (+0.7 kcal mol^–1).