PROBLEMS 5-1. A sieve plate in a distillation column has a vapor stream of 500 lb-mole/hr entering it with composition of 45 mole percent methanol and 55 mole percent water. The liquid stream flowing down onto this plate flows at 700 lb-mole/hr and has a composition of 50 mole percent methanol and 50 mole percent water. The distribution coefficient for methanol (K-value) is 2.2. The liquid and vapor streams leaving the plate have the same molar flow rates as those approaching the plate. Calculate the composition of the streams leaving the plate, assuming that equilibrium occurs on the plate (i.e., the plate is an ideal stage)