Fugacity Dependence on Pressure in an Ideal Binary Mixture
This Demonstration shows how the fugacities of benzene () and toluene () in a binary mixture change with pressure and composition at constant temperature. The liquid mixture is modeled as an ideal solution and the gas phase is assumed ideal, thus Raoult's law models vapor-liquid equilibrium. Use sliders to vary the temperature and mole fraction of benzene. Use buttons to view the pressure-composition diagram (--), the fugacity-pressure plot or both plots at once. Black dots on the diagrams represent the pressure (on the -- diagram) or fugacity (on the fugacity plot) for the given temperature and pressure.