Abstract
Enthalpies of mixing in water of 2-methyl-2-butanol with several electrolytes (alkali-metal halides, tetra-n-alkylammonium bromides, Ph4PCl, Ph4AsCl and NaPh4B) have been determined by flow microcalorimetry at 25°C. Enthalpic pair interaction coefficients, hNE, of the virial expansion of the excess enthalpy were calculated. All coefficients are positive and increase as the anionic size increases in anionic series of alkali-metal halides. A linear correlation between hNE and the number of carbon atoms in the apolar group of R4NBr is observed. For alkali-metal halides coefficients hNE depend mainly on the partial desolvation of halides, and for hydrophobic electrolytes both the partial desolvation of halide ions and hydrophobic interaction are the leading factors in the value of hNE.
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Sánchez-Montalvo, R., Calvente, J.J., Yanes, C. et al. Enthalpy of interaction of some electrolytes with 2-methyl-2-butanol in wate at 25°C. J Solution Chem 24, 953–966 (1995). https://doi.org/10.1007/BF00973448
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DOI: https://doi.org/10.1007/BF00973448