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A fourth parameter for the vapor pressure and entropy of vaporization of polar fluids
Author(s) -
Halm Roland L.,
Stiel Leonard I.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130228
Subject(s) - acentric factor , vaporization , boiling point , vapor pressure , thermodynamics , polar , chemistry , enthalpy of vaporization , entropy (arrow of time) , enthalpy , physics , astronomy
Pitzer's acentric factor approach has been extended to the vapor pressure and entropy of vaporization of polar fluids. Normal fluid vapor pressure functions have been determined for 0.44 ≤ T R < 0.56. A polarity factor has been defined and polar correction terms established for the vapor pressure for 0.44 ≤ T R < 0.70 and for the entropy of vaporization for 0.56 < T R < 0.72. The polar correction terms enable the accurate calculation of the vapor pressure and entropy of vaporization of a polar fluid from its normal boiling point and normal latent heat of vaporization. The results of this study also form the basis for the extension of this approach to other thermodynamic properties of polar fluids.