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Structural changes of water caused by non-electrolytes: Volumetric and compressibility approach for urea-like analogues

Abstract

Hydration of thiourea (TU), hydroxyurea (HU, hydroxycarbamide), acetone (AC, 2-propanone) and dimethyl sulfoxide (DMSO) has been investigated with the help of the volumetric and compression measurement. The apparent molar volumes and the apparent molar isentropic (adiabatic) compression have been calculated from the density and speed of sound data at temperatures ranging from 288.15 to 308.15 K at atmospheric pressure (0.1 MPa). From these data the standard partial molar volumes and the standard partial molar isentropic compressions have been calculated. The properties of the hydration spheres formed around investigated solutes have been characterised based on four parameters: (i) empirical slope for the dependency of the apparent molar volume on the concentration, (ii) difference between standard partial molar volume and van der Waals volume, (iii) standard partial molar compression, (iv) temperature dependency of the standard partial molar compression. The obtained results have been discussed and compared with the solvation properties of the N-alkyl derivatives of urea.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
JOURNAL OF MOLECULAR LIQUIDS no. 259, pages 112 - 123,
ISSN: 0167-7322
Language:
English
Publication year:
2018
Bibliographic description:
Wawer J., Krakowiak J.: Structural changes of water caused by non-electrolytes: Volumetric and compressibility approach for urea-like analogues// JOURNAL OF MOLECULAR LIQUIDS. -Vol. 259, (2018), s.112-123
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.molliq.2018.02.127
Verified by:
Gdańsk University of Technology

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