Thursday, December 17, 2009

EQUATIONS OF STATE

The equation which relate pressure-temperature-volume of substance,




  • the equation of state are useful for calculating properties of pure fluids and mixtures, for example, density of gas or liquid, vapor pressure, vapor-liquid equilibrium (vle), liquid-liquid equilibrium (lle), enthalpy, and entropy.
  • Mostely used form equations are
                1. Van der Waals equations
                2. Perturbation equations
                3. Virial and extended virial equations

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