Enthalpies of dilution of aqueous calcium chloride to low molalities at high temperatures
Journal Article
·
· J. Phys. Chem.; (United States)
The enthalpy of dilution of CaCl/sub 2/(aq) is obtained to a minimum molality of 1.7 x 10/sup -3/ mol x kg/sup -1/ at temperatures to 673 K from heat and liquid flow microcalorimetry. The measured dilution enthalpies at low concentrations above 573 K are more exothermic than those calculated from the limiting law. Comparison with similar results for NaCl(aq) indicates that extrapolation to infinite dilution based on strong electrolyte models for thermodynamic quantities may lead to significant error at high temperatures.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6444686
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 89:4; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
ENTHALPY
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
INFORMATION
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
PHYSICAL PROPERTIES
SOLUTIONS
THERMODYNAMIC PROPERTIES
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
ENTHALPY
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
INFORMATION
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
PHYSICAL PROPERTIES
SOLUTIONS
THERMODYNAMIC PROPERTIES