Consider mixtures of ethane(1) in water(2) at 350 K. Show that the vapor mole fraction of water goes through a minimum when the pressure of the system is increased at constant temperature. Clearly...

Consider mixtures of ethane(1) in water(2) at 350 K. Show that the vapor mole fraction of water goes through a minimum when the pressure of the system is increased at constant temperature. Clearly state and justify all assumptions. The following data may be helpful (all at 350 K): = 0.0416 MPa, vpure 2 = 18.5 cm3/mol, while the second virial coefficients take these values, B11 = –129, B12 = –77, and B22 = –560, all in cm3/mol.