The molar enthalpy of fusion of solid ammonia is 5. 65 kJ mol-", and the molar entropy of fusion is 28. 9 J K mol"!. (a) Calculate the Gibbs free energy change for melting of 1. 00 mol ammonia at 170 K, (b) Calculate the Gibbs free energy change for the conversion of 3. 60 mol solid ammonia to liquid ammonia at 170K. () Will ammonia melt spontaneously at 170K? (d) At what temperature are solid and liquid ammonia in equilibrium at a pressure of 1 atm?
