Question: A liquid mixture (x 1 = 0.4) evaporates at constant pressure by increasing the temperature. The first bubble has a composition of y 1 =

A liquid mixture (x₁ = 0.4) evaporates at constant pressure by increasing the temperature. The first bubble has a composition of y₁ = 0.7 because component 1 is more volatile and preferentially evaporates. As the last drop of liquid is evaporating, which is correct about the mole fraction of component 1 in the vapor phase?

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