Question

A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φᵢ yᵢ P = Yᵢ xᵢ fᵢ° where, Φ is a vapor fugacity component, Yᵢ is the liquid activity co-efficient and fᵢ° is the fugacity of the pure component i. The Kᵢ value (Yᵢ = Kᵢ xᵢ) is therefore, in general a function of

a.

temperature only.

b.

temperature and pressure only.

c.

temperature, pressure and liquid composition xᵢ only.

d.

temperature, pressure, liquid composition xᵢ and vapour composition yᵢ.

Answer: (c).temperature, pressure and liquid composition xᵢ only.

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Q. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φᵢ yᵢ P = Yᵢ xᵢ fᵢ° where, Φ is a vapor fugacity component, Yᵢ is the liquid...

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