Abstract
In this work, a theoretical thermodynamic model based on dissolution enthalpy was established to predict the osmotic and mean ion activity coefficients of metal chloride aqueous solutions. The dissolution enthalpies of CuCl2, CoCl2 and MnCl2 hydrates were measured from 298.15 to 323.15 K with the molality range from 0.1 to 3.0 mol·kg−1. Then the dilution enthalpies can be further calculated at corresponding temperature and molality. Therefore, with arbitrary temperature and molality, the osmotic and mean ion activity coefficients of the three solutions within the experimental condition can be calculated through the established model. The calculated results were consistent with the published data which indicates the thermodynamic model was reliable and acceptable.
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This work was financially supported by National Basic Research Program of China (2014CB643401) and the National Natural Science Foundation of China (No.51134007).
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Yi, X., Liu, Q., Ni, W. et al. A Temperature-Dependent Thermodynamic Model Derived from Dissolution Enthalpy of Metal Chloride Aqueous Solutions. J Solution Chem 51, 917–934 (2022). https://doi.org/10.1007/s10953-022-01183-x
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DOI: https://doi.org/10.1007/s10953-022-01183-x