Problem 11.9: Assuming the system methanol(1)/ethanol(2) to form ideal solutions, do the following:
a) Calculate the bubble and dew pressure at 100 °C of a mixture that contains 20% methanol by mol.
b) Construct a Pxy graph at 100 °C.
c) Construct a Txy graph at 1.2 bar.
d) A stream that contains a methanol/ethanol mixture with 32% mol methanol is flashed to 100 °C to a pressure such that the molar rate of the vapor stream is 75% of the feed. Determine the temperature and the composition of the two phases. The Antoine equation for the pure components are given below:
