Isotope effects in aqueous systems. 12. Thermodynamics of urea-h/sub 4//H/sub 2/O and urea-d/sub 4//D/sub 2/O solutions
Differential vapor pressure measurements yielding osmotoic coefficients and osmotic coefficient isotope effects for urea h/sub 4//H/sub 2/O and urea-d/sub 4//D/sub 2/O solutions (4, 8, 12, 16, 18, 20 m, and saturated) are reported over the temperature range 15 to 60/sup 0/C. Solubilities and apparent molar volumes and their isotope effects (IE's) have also been measured. From these various data as supplemented by information from published sources, we have calculated standard-state (infinite-dilution) and excess partial molar free energies, volumes, enthalpies, and expansivities (and their isotope effects) as appropriate. Raman spectra in the librational and OH and OD stretching regions are reported. The various data are discussed in terms of solution models of the urea/water system in the context of the theory of isotope effects in condensed phases.
- Research Organization:
- Univ. of Tennessee, Knoxville
- OSTI ID:
- 6066428
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 85:23
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM
ISOTOPE EFFECTS
UREA
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
AQUEOUS SOLUTIONS
DEUTERIUM COMPOUNDS
ENTHALPY
EXPERIMENTAL DATA
HEAVY WATER
MEDIUM TEMPERATURE
SOLUBILITY
TEMPERATURE EFFECTS
VOLUME
WATER
AMIDES
CARBONIC ACID DERIVATIVES
DATA
DISPERSIONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MIXTURES
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SOLUTIONS
STABLE ISOTOPES
400302* - Organic Chemistry- Isotope Effects- (-1987)