Chapter 11.12, Problem 23P

You are interested in evaluating how well you can predict the phase-behavior of a system using an excess molar Gibbs free energy model. Here, use the van Laar predictions (from the VDW-defined parameters) relative to fitting the data (in Table P11-23) with the van Laar model for the methanol (1) + water (2) system at 328.15 K. What is your conclusion based on these results?

TABLE P11-23 Vapor-liquid equilibrium of methanol (1) + water (2) at 328.15 K.