part b

q = quality

2. a. A feed mixture of ethanol and water is 30.0mol% ethanol. The feed is at 200C and is at a high enough pressure that it is a liquid. It is input into the column through a valve, where it flashes. Column pressure is 1kg/cm2. Find the slope of the feed line. Hint: Equation (4-17) and Figure 4-3 from Wankat can be useful for reference as well as the "Notes on Use of Enthalpy Concentration Diagram" posted in Module 6. b. We are separating ethanol and water in a distillation column at a pressure of 1kg/cm2. Feed is at 40wt% ethanol. The feed is a liquid at 250C and flashes when the pressure is dropped as it enters the column. Find q. Assume constant molal overflow is valid