14. For a certain process, at 311 K, ΔG = –20.5 kJ and ΔH = –8.00 kJ. If the process is carried out reversibly, what is the amount of useful work that can be performed? (A) –8.00 kJ (B) –20.5 kJ (C) –28.5 kJ (D) –40.2 kJ