NDLI: Thermal coefficients and internal pressure of aqueous urea. Concentration, temperature, and isotopy effects

Content Provider	SpringerLink
Author	Korolev, V. P.
Copyright Year	2010
Abstract	The thermal expansion α, isothermal compressibility β, and internal pressure coefficients of H$_{2}$O-(NH$_{2}$)$_{2}$CO and D$_{2}$O-(ND$_{2}$)$_{2}$CO fy systems at 278 K, 298 K, and 318 K and aquamolality m ≤ 1.5 were calculated. The changes in the isotope differences Δα, Δβ$_{T}$, and Δfy at different solute concentrations and temperature are discussed. In contrast to Δα and Δfy, Δβ$_{T}$ is almost independent of the urea concentration already at 298 K and independent of m at 318 K. The derivative δfy/δT increased in dilute solution, at lower temperatures, and on passing from protium to deuterium system, which corresponded to increased structuring. The isotope difference for the Grüneisen constant at given temperatures and concentrations is shown to be independent of the urea content.
Starting Page	76
Ending Page	81
Page Count	6
File Format	PDF
ISSN	00224766
Journal	Journal of Structural Chemistry
Volume Number	51
Issue Number	1
e-ISSN	15738779
Language	English
Publisher	Springer US
Publisher Date	2010-03-21
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	urea aqueous solutions thermal coefficients internal pressure Solid State Physics Atomic/Molecular Structure and Spectra Atomic, Molecular, Optical and Plasma Physics Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Inorganic Chemistry Physical and Theoretical Chemistry

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Thermal coefficients and internal pressure of aqueous urea. Concentration, temperature, and isotopy effects