ECH3126: Tutorial 2
Question 1
A mixture of 100 kg mol which contains 60 mol % n-pentane (A) and 40 mol % n-heptane (B)
is vaporized at 101.32 kPa pressure under differential conditions until 40 kg mol are distilled.
a) Calculate the relative volatility for each concentration and comment on the possibility
of separation.
b) What is the average composition of the total vapor distilled and the composition of the
remaining liquid?
c) If this same vaporization is done in a flash distillation and 40 kg mol are distilled, what
is the composition of the vapor distilled and of the remaining liquid?