Twenty kmol/hr of an equimolar mixture of n-pentane (1) +2-propanol (2) at 50 C and 200kPa is sent to a flash distillation unit operating at 50C and 75kPa. Report the following information assuming Raoult's law is valid:

a) Show that the mixture will flash in the flash distillation unit.

b) Report the flowrate and composition of the overhead (re: vapor) stream.

c) Report the flowrate and composition of the bottoms (re: liquid) stream Which assumption that you made in solving this problem would you characterize as least valid and why?