1. 450 kmol per hour of a mixture of n-butanol (C4H9OH) and iso-butanol

(C4H10O) containing 30 mole % n-butanol is separated by distillation into two fractions.

The flow rate of n-butanol in the overhead stream is 120 kmol/h and that of iso-butanol in

the bottom stream is 300 kmol/h. The operation is at steady state. Calculate the unknown

component flow rates in the output streams. What is the mole fraction of n-butanol in the

bottom stream? What is the mass fraction?