In certain composition ranges of mixtures of ethylene tetrachloride (C2Cl4), isopropyl alcohol, and water separate, if given enough time, into two liquid phases. A table of eqilibirium data is shown below: The left-hand side of the table shows the compositions in the lower layer and the right-hand side shows the compositions of the upper layer in equilibrium with that composition. In the process for today, 100 lbs of a composition of 40%-by-mass C2Cl4, 38%-by-mass isopropyl alcohol and 22%-by-mass water is initially mixed and then allowed to separate. Lower layer %-by-mass Upper layer %-by-mass C2Cl4 isopropyl alcohol water C2Cl4 isopropyl alcohol water 100 0 0 0 0 100 94 5 1 1 33 66 88 10 2 21 49 30 82 15 3 35 46 19 76 20 4 20 38 12 a. Draw a schematic of this process. b. Based on your drawing, conduct a degree of freedom analysis. Is this problem solvable? Justify your answer. c. Assuming that the lower level contains 10%-by-mass isopropyl alcohol, what is the mass of each of the two phases formed?

Question

In certain composition ranges of mixtures of ethylene tetrachloride (C2Cl4), isopropyl alcohol, and water separate, if given enough time, into two liquid phases. A table of eqilibirium data is shown below: The left-hand side of the table shows the compositions in the lower layer and the right-hand side shows the compositions of the upper layer in equilibrium with that composition. In the process for today, 100 lbs of a composition of 40%-by-mass C2Cl4, 38%-by-mass isopropyl alcohol and 22%-by-mass water is initially mixed and then allowed to separate.

Lower layer %-by-mass Upper layer %-by-mass
C2Cl4 isopropyl alcohol water C2Cl4 isopropyl alcohol water
100 0 0 0 0 100
94 5 1 1 33 66
88 10 2 21 49 30
82 15 3 35 46 19
76 20 4 20 38 12

a. Draw a schematic of this process.

b. Based on your drawing, conduct a degree of freedom analysis. Is this problem solvable? Justify your answer.

c. Assuming that the lower level contains 10%-by-mass isopropyl alcohol, what is the mass of each of the two phases formed?

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