Chapter 11.12, Problem 20P

The azeotrope of a binary mixture, being an important point on a mixture phase diagram, is often used for parameter estimation. To that end, use the azeotropic information for the acetone (1) + cyclohexane (2) system at 308.15 K to determine the A parameter of the 1-parameter Margules equation. Then plot the Pxy predictions from this model and compare it to the experimental data in Table P11-20. Note that you will need to plot the experimental data first to estimate the location of the azeotrope.

Table P11-20 Vapor-liquid equilibrium of acetone (1) + cyclohexane (2) at 308.15 K.