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A solution contains 43.0 g of heptane (C7H16) and 46.0 g of octane (C8H18) at 25...

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Chemistry

A solution contains 43.0 g of heptane (C7H16) and 46.0 g ofoctane (C8H18) at 25 ∘C. The vapor pressures of pure heptane andpure octane at 25 ∘C are 45.8 torr and 10.9 torr, respectively.Assuming ideal behavior, calculate each of the following.

The vapor pressure of heptane in the mixture.
The vapor pressure of octane in the mixture.
The total pressure above the solution.
What is the concentration of heptane in mass percent?
What is the concentration of octane in mass percent?

Why is the composition of the vapor different from thecomposition of the solution?

Answer & Explanation Solved by verified expert
4.5 Ratings (825 Votes)
A solution contains 430 g of heptane C7H16 and 460 g of octane C8H18 at 25 C The vapor pressures of pure heptane and pure octane at 25 C are 458 torr and 109 torr respectively Assuming ideal behavior calculate each of the following Solution Calculating mole fraction    See Answer
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