Question $8$ of $8$

$\frac{-}{10}$

Liquid methyl ethyl ketone $($MEK$)$ is introduced into a vessel containing air.

The system temperature is increased to $55\mathrm{.}0C,$ and the vessel contents reach equilibrium with some MEK remaining in the liquid state.

The equilibrium pressure is $1600\mathrm{.}0mmHg.$

Physical Property Tables

Degrees of Freedom

Use the Gibbs phase rule to determine how many degrees of freedom exist for the system at equilibrium.

i

Degrees of freedom

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Vapor Mole Fraction

Mixtures of MEK vapor and air that contain between $1\mathrm{.}80$ mole$\%$ MEK and $11\mathrm{.}5$ mole$\%$ MEK can ignite and burn explosively if exposed to a flame or spark.

What is the mole fraction of MEK in the vessel?