The vapor-liquid equilibrium (VLE) condition which may be expressed as?(a) y = f (S, H, T)(b) y = f (P, T, x)(c) x = f (T, S)(d) y = f (J, S)The question was asked by my college director while I was bunking the class.My doubt is from Extractive Distillation topic in portion Azeotropic and Extractive Distillation of Distillation Design

The vapor-liquid equilibrium (VLE) condition which may be expressed as

1.	The vapor-liquid equilibrium (VLE) condition which may be expressed as?(a) y = f (S, H, T)(b) y = f (P, T, x)(c) x = f (T, S)(d) y = f (J, S)The question was asked by my college director while I was bunking the class.My doubt is from Extractive Distillation topic in portion Azeotropic and Extractive Distillation of Distillation Design
Answer» Right option is (b) y = f (P, T, x) For explanation: Where x and y are the liquid and VAPOR COMPOSITIONS, and P and T are the SYSTEM pressure and temperature, RESPECTIVELY T and x are not independent at the equilibrium state.

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