Abstract
The specific heat capacities of the aqueous multicomponent system NaCl +KCl+MgCl2+CaCl2 with ionic strength between 8.3 and 9.6 (resembling Dead Sea waters) were measured between 15°C and 45°C. The obtained data were fitted to an empirical equation as a function of concentration and temperature. The thermodynamic functions of the studied multicomponent system were found to be strongly influenced by changes in MgCl2 concentrations. The application of Young's rule to such concentrated systems was checked at 25°C. The calculated (by Young's rule) specific heat capacities Cp and apparent molar heat capacities Cp,φ{symbol} of these multicomponent electrolyte solutions were in reasonable agreement with the measured values (-0.008 J-g-1-K-1 and -2.6 J-mol-1-K-1, respectively).
Original language | English (US) |
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Pages (from-to) | 635-649 |
Number of pages | 15 |
Journal | Journal of Solution Chemistry |
Volume | 21 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1 1992 |
Keywords
- CaCl
- KCl
- MgCl
- NaCl
- Specific and apparent molar heat capacities
- Young's rule
- artificial Dead Sea waters
- brines
- flow calorimetry
- mixed solutions
- multicomponent aqueous solutions
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Physical and Theoretical Chemistry