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New interpretation of the concentration dependence of the compressibility of aqueous solutions of nonelectrolytes.
Autorzy
Rok wydania
2011
Czasopismo
International Journal of Thermophysics
Numer woluminu
32
Strony
786-794
DOI
10.1007/s10765-010-0758-0
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The parabolic-like plots of compressibility versus concentration of nonelectrolytes (ethanol as the example) in water are explained and described assuming the hydrate formation equilibrium reaction. Only two fitted parameters, the hydration number n h and the cumulative formation constant of the hydrate βnh, are used to reproduce the experimental data, including the minima of the adiabatic compressibility κS versus composition at low solute contents. Another discussed option is a set of subsequent equilibrium reactions of hydration from which formation constants can also be determined. Calculations were performed for the water–ethanol system, and the results were compared with those obtained by a model recently developed by the authors.
Słowa kluczowe
Aqueous solutions, Compressibility, Hydrates, Nonelectrolytes
Adres publiczny
http://dx.doi.org/10.1007/s10765-010-0758-0
Strona internetowa wydawcy
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