Chemical Engineering Thermodynamics

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: Option C.

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