For the same ternary system as in Exercise 11.4, use a process-simulation program with the UNIFAC equation

Question:

For the same ternary system as in Exercise 11.4, use a process-simulation program with the UNIFAC equation to calculate a portion of a residue curve at 1 atm starting from a bubble-point liquid with a composition of 20 mol% acetone, 60 mol% benzene, and 20 mol% n-heptane.