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 gE-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 F1=0.9955 and F2=1.0068.
Using the calculated total pressure and the calculated vapor phase composition, the real gas factor can be calculated. Repeating the calculation will result in new values for total pressure and vapor phase composition and therefore new real gas factors. Iteration leads to: