US EPA

8685042 

Journal Article 

Vapor-liquid equilibrium. III: Benzene-Cyclohexane Mixtures 

Scatchard, G; Wood, SE; Mochel, JM 

1939 

1 

Journal of Physical Chemistry
ISSN: 0022-3654 

43 

1 

119-130 

English 

10.1021/j150388a009 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000509251&doi=10.1021%2fj150388a009&partnerID=40&md5=5ca5c305afb594b18966aa2262737f3c
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The vapor-liquid equilibrium of benzene-cyclohexane mixtures has been measured at 40° and 70°C. over the whole composition range, and at 30°, 50°, and 60°C. for approximately equimolal mixtures. The densities of the liquid mixtures have been measured at 30°C. The measurements have been expressed analytically. From these measurements have been calculated the thermodynamic functions, including the energy and entropy of mixing at constant total volume. These mixtures are very far from regular, and only half the deviation is explained by the volume change on mixing. There is also an asymmetry in the relation to composition. It is suggested that these facts may be explained by the persistence in the pure liquids of a slight tendency toward the orientations of the crystal lattices. 1939, American Chemical Society. All rights reserved.