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Determination of the Krichevskii function in near-critical dilute solutions of I2(s) and CHI3(s)

✍ Scribed by M.Laura Japas; Jorge L. Alvarez; Karin Gutkowski; Roberto Fernández-Prini

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
237 KB
Volume
30
Category
Article
ISSN
0021-9614

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✦ Synopsis

In the present work the solubility of CHI s in xenon has been spectrophotometrically 3 measured at different sub-and supercritical temperatures, and along the isotherm of T s 316.9 K at pressures between 5 MPa and 10 MPa. Using these results together Ž . Ž . with already available solubilities for I s and CHI s in near-critical solvents, we have 2 3 Ž . ϱ calculated the Krichevskii function Ѩ prѨ x for a series of dilute near-critical binary V , T solutions; this quantity accounts for solute᎐solvent interactions in the binary mixtures. The Krichevskii functions are found to be only weakly dependent on the temperature. The fluid Ž . ϱ density dependence of Ѩ prѨ x is discussed in terms of intermolecular interactions; the V , T fluorinated solvents show very low interaction with the solutes. Krichevskii functions can be used to predict various thermodynamic properties of the solution.

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