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Part A

If 0.440 mol of a nonvolatile nonelectrolyte are dissolved in 3.40 mol of water, what is the vapor pressure PH2O of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25 ∘C .

Express your answer with the appropriate units.

PH2O =

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Solutions containing volatile solutes

In solutions composed of two liquids (A and B), each liquid contributes to the total vapor pressure above the solution. The total vapor pressure is the sum of the partial pressures of the components:

Ptotal=PA+PB=XAP∘A+XBP∘B

where P∘A and P∘B are the vapor pressures of pure A and B, respectively.

Part B

A solution is composed of 1.50 mol cyclohexane (P∘cy=97.6 torr) and 2.40 molacetone (P∘ac=229.5 torr). What is the total vapor pressure Ptotal above this solution?

Express your answer with the appropriate units.

Ptotal =

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Nelly Stracke
Nelly StrackeLv2
28 Sep 2019

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