Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

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

Guo, R.[Ruifeng], Li, S.[Shuni], Zhai, Q.[Quanguo], Jiang, Y.[Yucheng], Hu, M.[Mancheng]
J. Chem. Eng. Data 2017, 62, 9, 2541-2548
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 (+-), the osmotic coefficient (F), the excess Gibbs free energies (GE), the standard Gibbs free energy of transference (Gt0) and the primary hydration number (nhydr).
# Formula Name
1 ClCs cesium chloride
2 H2O water
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Mean ionic activity coefficient - 1 ; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Potentiometry
  • 23