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Activity Coefficients of CsCl in PEG 200–H2O and PEG 600–H2O Mixtures at 298.15 K

Activity Coefficients of CsCl in PEG 200–H2O and PEG 600–H2O Mixtures at 298.15 K

Authors :
Ruifeng Guo
Yucheng Jiang
Quan-Guo Zhai
Shu-Ni Li
Mancheng Hu
Source :
Journal of Chemical & Engineering Data. 62:2541-2548
Publication Year :
2017
Publisher :
American Chemical Society (ACS), 2017.

Abstract

The mean activity coefficients of the ternary systems CsCl + polyethylene glycol (PEG) (w) + H2O (1 – w) (w = 10%, 20%, 30%, 40%) determined by the potentiometric method at T = 298.15 K are reported. The molecular weights of PEG are 200 and 600, and the CsCl molality varies from 0.01 to 4.00 mol/kg. To correlate the experimental data, the Pitzer equation, extended Debye–Huckel equation, and the modified Pitzer equation have been utilized herein. As a result, a series of thermodynamic parameters were obtained and discussed in detail, including the mean ionic activity coefficients (γ±), the osmotic coefficient (Φ), the excess Gibbs free energies (GE), the standard Gibbs free energy of transference (ΔGt0) and the primary hydration number (nhydr).

Details

ISSN :
15205134 and 00219568
Volume :
62
Database :
OpenAIRE
Journal :
Journal of Chemical & Engineering Data
Accession number :
edsair.doi...........8a19299903f0dd2b00e61cd516044054
Full Text :
https://doi.org/10.1021/acs.jced.7b00024