A mixture containing equal parts by mass of ethanol and water is distilled to cr
A mixture containing equal parts by mass of ethanol and water is distilled to create an ethanol-‐rich fraction collected at the top of the column and a water-‐rich fraction at the bottom. The feed flows in at 1000 kg/hr and the water-‐ rich bottom stream flows out at 675 kg/hr. The ethanol-‐rich top stream contains
90.0 wt% ethanol.
(a) Draw a schematic of the process and label what is known and unknown.
(b) Do a degrees-‐of-‐freedom analysis to demonstrate/determine if you have enough information to solve the problem.
(c)Calculate the mass flow rate of the ethanol-‐rich top stream as well as its water wt%. Also calculate the composition of the water-‐rich bottom stream as wt% and as mol%.