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A solution contains 59.0 g of heptane (C7H16) and 44.5 g of octane (C8H18) at 25...

A solution contains 59.0 g of heptane (C7H16) and 44.5 g of octane (C8H18) at 25 ∘C. The vapor pressures of pure heptane and pure octane at 25 ∘C are 45.8 torr and 10.9 torr, respectively. Assuming ideal behavior, calculate each of the following. (Note that the mole fraction of an individual gas component in an ideal gas mixture can be expressed in terms of the component's partial pressure.)

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 mass percent concentration of heptane in vapour phase?

What is the mass percent concentration of octane in vapour phase?

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

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