#### Using a Cubic EOS to Determine Vapor-Liquid Equilibrium: Example Problem

Try to solve these problems before watching the solutions in the screencasts.

##### Example Problem 1

for the Peng-Robinson equation of state for mixtures to determine vapor-liquid equilibrium. Determine the fugacity coefficients in both liquid and vapor phases to calculate the bubble point pressure and vapor composition. Given below are the temperature and liquid compositions. Determine the vapor compositions, yi and the pressure.
xpentene = 0.20    xhexane = 0.30    xheptane = 0.50     T = 315 K