(solution) Pure Sn melts at 505.1K with an enthalpy of fusion of 7.029 kJ

(solution) Pure Sn melts at 505.1K with an enthalpy of fusion of 7.029 kJ

Pure Sn melts at 505.1K with an enthalpy of fusion of 7.029 kJ mol-1; Pure Zn melts at 692.7K with an enthalpy of fusion of 7.322 kJ mol-1. Using this date plus the phase diagram attached calculate the Gibbs energy of mixing at the eutectic point.

Compare the answer with the Gibbs energy of mixing that the eutectic liquid would have if it were an ideal solution. Suggest reasons for any difference in values.