Abstract
The dependence of the Gibbs energy of hydration of univalent ions was calculated on the basis of integral equations for a molecular liquid. Calculations were performed in the approximation of the reference interaction site model (RISM). The relation between the energy of hydration of ions and local electrostatic field microinhomogeneities in solution was studied. It was shown that the best variant was the RISM with the hypernetted chain closure, partial inclusion of orientation effects, and semiempirical corrections for the excluded volume and the presence of H-bonds with solutes. Predictions based on the selected variant of the model were in close agreement with the experimental data. The analysis performed indicated directions for the improvement of the RISM method.
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Original Russian Text © V.A. Kolombet, V.P. Sergievskii, 2010, published in Zhurnal Fizicheskoi Khimii, 2010, Vol. 84, No. 9, pp. 1613–1618.
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Kolombet, V.A., Sergievskii, V.P. The special features of the thermodynamic characteristics of hydration of univalent ions according to the reference interaction site model. Russ. J. Phys. Chem. 84, 1467–1472 (2010). https://doi.org/10.1134/S0036024410090025
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DOI: https://doi.org/10.1134/S0036024410090025