A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yiis 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
(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