Î1lva,-42.55 kJ/mol alculate the entropy of vaporization, ÎSvap, for A(/) at 250°C given that the boiling point of A is 76.53 â, and the molar heat capacity of A() is 116.59 J/(mol K). Assume that the molar heat capacity of A(g) is 6.7% of that of A() Number J.molK vap Calculate the standard Gibbs free energy of vaporization, ÎGvap, at 25.0 â Number k.J/ mol vap etermine the equilibrium constant, K' for the vaporization at 179.0 °C. Number Continued below etermine the temperature range over which the vaporization of A(D) is spontaneous. Assume that the nthalpy and entropy of vaporization change very little with temperature.