Adiabatic compressibility and structural features of non-electrolyte aqueous solutions |
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Authors: | V N Afanas’ev V A Golubev |
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Institution: | 1.Institute of Solution Chemistry,Russian Academy of Sciences,Ivanovo,Russia |
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Abstract: | Structural characteristics of the hydration complexes of non-electrolytes such as the hydration numbers h, molar adiabatic compressibility of hydration complexes β
h
V
h
, the molar volume of water in the hydration sphere V
1h
, the solute molar volume without hydration environments V
2h
and others are determined using the data on the ultrasonic velocity, the density and heat capacity of aqueous solutions of
urea, urotropine, acetonitrile, and a number of amides of N-acetyl amino acids. A theoretical model of solvation is also applied.
A comparison of the environments of hydrated urotropine molecules with those of urea and acetonitrile molecules in an aqueous
medium shows a considerable hydrophobic interaction of urotropine with a solvent. |
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Keywords: | |
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