Problem 3. A mixture of 50mol% Methanol (1) and 50mol% water (2) at 25C and 101.325kPa pressure are fed into a flash tank at 80C and the same pressure. A mixture of vapor and liquid forms. 3a. 15 pts. Assuming Raoult's Law holds, determine the composition of the vapor and liquid phases, and the fraction of vapor and liquid that exit the flash tank. 3b. Ib. 20 pts. Determine the heat effect of the process (how much heat must be added to the flash tank to bring about the process described in part la above