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Old and new problems in the field of vapor‐liquid equilibria
Author(s) -
Redlich Otto
Publication year - 1965
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450430307
Subject(s) - fugacity , analogy , consistency (knowledge bases) , representation (politics) , field (mathematics) , function (biology) , thermodynamics , association (psychology) , statistical physics , computer science , mathematics , epistemology , physics , artificial intelligence , pure mathematics , philosophy , evolutionary biology , politics , biology , political science , law
The present survey elaborates some of the topics discussed in an address presented at the 13th Canadian Chemical Engineering Conference in Montreal, October 23, 1963. Such a survey, of course, can mention only few of the important contributions of various authors that have elucidated the field of vapor‐liquid equilibria in the last twenty years. Thermodynamic consistency is only briefly mentioned. Since activity and fugacity coefficients are used for quite different purposes it is better to define them differently without trying to maintain a formal analogy. Activity coefficients of non‐associating mixtures are satisfactorily represented by the traditional two‐parameter relations. For associated solutions, as a rule, an association function must be superimposed. Further development and testing of association terms is desirable. Progress in the systematic representation of interaction in solution is promising. Calorimetric measurements in recent years have made considerable contributions.