Heat capacity and other thermodynamic properties of aqueous magnesium sulfate to 473 K
Measurements are reported for the heat capacity of aqueous MgSO/sub 4/ from 348 to 473 K. Ion-interaction (Pitzer) equations are fitted to these data with additional guidance for C/sub p//sup 0//sub 2/. The last quantity is obtained indirectly from literature data for MgCl/sub 2/, Na/sub 2/SO/sub 4/, and NaCl; the authors have made a new analysis for MgCl/sub 2/ but used published expressions for the sodium compounds. Literature data on the osmotic coefficient and the enthalpy of MgSO/sub 4/ solutions are used to complete a comprehensive thermodynamic treatment. Since all of the other major components of natural waters and sea water have been treated with the same set of equations and over a wide temperature range, the present results for MgSO/sub 4/ complete the basic data set required for prediction of most thermodynamic properties of these systems. The effectiveness of a special second-viral-coefficient term in representing the ion pairing MgSO/sub 4/ is considered in some detail.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5954589
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:5; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
ENTHALPY
EQUATIONS
EXPERIMENTAL DATA
FRESH WATER
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
INFORMATION
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
MAGNESIUM SULFATES
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SEAWATER
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM SULFATES
SOLUTIONS
SPECIFIC HEAT
SULFATES
SULFUR COMPOUNDS
THERMODYNAMIC ACTIVITY
THERMODYNAMIC PROPERTIES
VIRIAL EQUATION
WATER