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8588445 
Journal Article 
On the thermodynamics of partially miscible liquid binary systems 
Liebermann, E; Olaj, OF 
1981 
1 
Monatshefte für Chemie / Chemical Monthly
ISSN: 0026-9247
EISSN: 1434-4475 
Springer-Verlag 
VIENNA 
112 
3 
259-271 
English 
WOS:A1981LG44900001 
Isobaric coexistence curves of two liquid phases are predicted from the temperature and composition at the consolute point of binary solutions consisting of a hydrocarbon and the corresponding perfluorocarbon. Excess enthalpies obtained from the free volume theory of Flory as well as from calorimetric measurements are used to account for the temperature dependence of the Gibbs energy of mixing. The treatment is based on the extension of the Flory-Huggins model to nonathermal polymer solutions. Formal applicability to mixtures of molecules not largely differing in size is achieved by introducing generalized variables characterizing composition in place of volume fractions. Phase diagrams of following systems are predicted and compared with experimental results: methane+carbontetrafluoride, n-hexane+perfluoro-n-hexane, n-heptane+perfluoro-n-heptane, methylcyclohexane+perfluoromethyl-cyclohexane. © 1981 Springer-Verlag. 
Binary liquid mixtures, thermodynamics of; Liquid-liquid phase equilibria