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A solution contains 44.0 g of heptane (C7H16) and 58.5 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.) What is the VP for heptane/octane and total VP?


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  • It also wants the mass percent concentration of octane and heptane in the vapor phase. Michelle commented almost 2 years ago