Application of Kirkwood-Buff theory to electrolyte solutions. III. Activity coefficients of aqueous NaCl between 273.15 and 573.15 K |
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Authors: | Yudu Cheng Kenneth E. Newman |
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Affiliation: | (1) Department of Chemistry, University of Sherbrooke, J1K 2R1 Sherbrooke, Quebec, Canada;(2) Department of Chemistry, The King's College, 10766-97th Street, T5H 2M1 Edmonton, Alberta, Canada |
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Abstract: | Using a theory recently developed for the interpretation of activity coefficients of 1:1 electrolytes up to high concentrations in aqueous solution at 25°C, we have analysed available data for aqueous sodium chloride solutions up to saturation in the temperature range 273.15–573.15 K. The approach, which is based on Kirkwood-Buff theory and uses the truncated Poisson-Boltzmann equation to obtain the required information about the various ion-ion radial distributions, is able to fit the results to high accuracy with minimum of parameters, viz, three, of which one is the distance of closest approach, the other two relate to ion-solvent interactions and/or higher order terms in the ion-ion interaction. |
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Keywords: | Activity coefficients NaCl high temperature Kirkwood-Buff |
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