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Choose the one alternative that best completes the statement or answers the question. For the reaction 3 C2H2(g) →C6H6(l) at 25°C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K. Calculate the standard free energy change at 25°C. A) -503 kJ B) -618 kJ C) 948 kJ D) -1061 kJ