A mixture of 25% propane, 15% n-butane, 20% n-pentane, and 40% n-hexane by mole fraction, with a flow rate of 2000 kmol/h, is fed to a flash distillation column operating at 60C and 250 kPa.

a) Calculate the quantities and compositions of the resulting vapor and liquid phases.

b) Prepare a computer program that performs the calculations requested above and presents the results.

Note: You do not have to write program for it but please indicate reasonings so I can understand clearly.