(6) 6. Use the vapor liquid composition curve, below, for a minture of eyelohexa

Question

(6) 6. Use the vapor liquid composition curve, below, for a minture of eyelohexane and toluene to ansiver the following questions. a. What is the boiling point of pure 110 toluene? Vapor What is the boiling point of a mixture of 58% cyclohexane and 42% toluene? b. 100 100 c. If a simple distillation is performed on a mixture of 58% cyclohexane and 42% toluene, what is the composition of the vapor that condenses to form the first drop of liquid? - 90 Liquid 80 80 100% Cycl. 0% Tol, 80 20 60 40 40 60 20 80 Cyclo% Tol 100% -Mole percent cyclohexane Mole percent toluene

Explanation / Answer

a.

BP of toluene --> must be the temperature of % toleuen 100%

this is approx at the right side, T = 110° C approx

b.

boiling point of 58-42% mix

for T = 48% --> this must be approx the point in T = 90°C, since this is when liquid vapor line intersects

c.

1 simple distillation --> find concentrations:

start from point ---> in "b" then distill this, implies going from C to B, then condensing B will give you A

A = has approx --> 75% toluene and 25% cyclohexane

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