Thermodynamics of calcium chloride in highly concentrated aqueous solution and in hydrated crystals
- Lawrence Berkeley Lab., CA (United States) Univ. of California, Berkeley (United States)
Measured values of the pressure of H[sub 2]O over saturated solutions in equilibrium with the dihydrate, tetrahydrate or hexahydrate of CaCl[sub 2] are converted to osmotic coefficients and compared with literature values for solutions of smaller molality. It is found that the osmotic coefficient is constant, within the uncertainty, from about 7 mol-kg[sup [minus]1] to saturation at all temperatures from 25 to 100[degrees]C. From this simple approximation, the activity coefficient is calculated for high molalities and at saturation. By combination of these results with other established data, entropies and Gibbs energies of formation are calculated for the crystalline hydrates of CaCl[sub 2]. 10 refs., 1 fig., 3 tabs.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6709122
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 22:2; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ENERGY
ENTROPY
FORMATION FREE ENERGY
FREE ENERGY
HALIDES
HALOGEN COMPOUNDS
HYDRATES
MIXTURES
PHYSICAL PROPERTIES
SATURATION
SOLUTIONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES