Van der Waals liquids, Flory theory and mixing functions for chlorobenzene with linear and branched alkanes
Por:
Domínguez A., Tardajos G., Aicart E., Pérez-Casas S., Trejo L.M., Costas M., Patterson D., Van Tra H.
Publicada:
1 ene 1993
Resumen:
The basic assumption of the Flory theory of solution thermodynamics, van der Waals behaviour of the components, is contravened by chlorobenzene and other complex liquids. Their internal pressure decreases, instead of increasing, with decreasing volume. Using chlorobenzene with a series of normal alkanes and four highly branched isomers the following quantities have been measured at 25 °C and equimolar concentration: HE, VE, dVE/dT, dVE/dp, ?(?VT), CEp, ?(??VT) and ?Cv. Against expectation, the Flory theory predicts the main trends of all these data. dVE/dT, ?(?VT) and CEp for n-Cm systems show deviations from the theory which are readily explained by temperature-sensitive order in the long-chain pure n-Cm liquids. We conclude that the Flory theory remains useful, at least for chlorobenzene, in spite of the breakdown of its van der Waals assumption.
Filiaciones:
Domínguez A.:
Departamento de Química-Física, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
Tardajos G.:
Departamento de Química-Física, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
Aicart E.:
Departamento de Química-Física, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
Pérez-Casas S.:
Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México, Mexico D.F. 04510, Mexico
Trejo L.M.:
Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México, Mexico D.F. 04510, Mexico
Costas M.:
Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México, Mexico D.F. 04510, Mexico
Patterson D.:
Chemistry Department, McGill University, 801 Sherbrooke St. West, Montreal, Que. H3A 2K6, Canada
Van Tra H.:
Departament de Chimie, Université du Quebec á Montreal, C.P. 1888 Succ. A, Montreal, Que. H3C 3P8, Canada
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