Calculate the pressure and the vapor phase mole fraction for the system ethanol (1) - water (2) at 70°C with the help of the different g^{E}-models (Wilson, NRTL, UNIQUAC) for an ethanol mole fraction of 0.252 using the interaction parameters, auxiliary parameters and Antoine constants given in Fig, 5.30 and assuming ideal vapor phase behavior. Besides total and partial pressures and vapor phase composition, calculate also K-factors and separation factors. Repeat the calculation using the real gas factors F_{1}=0.9955 and F_{2}=1.0068.