A Bottle Is Half Filled with a Mixture of 25 $\degree$

question 60

Essay

A bottle is half filled with a mixture of 25% liquid heptane and 75% liquid octane by moles at 25 $\degree$ C.What is the mole ratio of heptane to octane in the space above the liquid compared to in the liquid? The vapor pressures are 31 torr for heptane and 11 torr for octane.

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