A CRITICAL REVIEW OF THE SECOND VIRIAL COEFFICENTS FOR WATER VAPOR WITH AIR AND WITH ARGON

The equations defining the interaction second virial coefficients for water vapor with air and with argon are presented with the experimental and computational methods used in deriving the coefficients. Comparative tabulations of the coefficients ranged from −20 °C to 100 °C are given along with the associated uncertainties. Based on ab initio quantum calculations, it is feasible to construct highly accurate pair potential for Ar-H2O mixture to achieve a smaller uncertainty in the second virial coefficient than that derived from an experiment. For Air-H2O mixture, the uncertainty obtained from vapor-liquid water isothermal equilibrium experiment is comparable to that of Ar-H2O mixture obtained from first principle calculations.

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