Heat capacities of concentrated multicomponent aqueous electrolyte solutions at various temperatures

Boris S. Krumgalz; Ilan A. Malester; Irving J. Ostrich; Frank J. Millero

doi:10.1007/BF00650758

Heat capacities of concentrated multicomponent aqueous electrolyte solutions at various temperatures

Boris S. Krumgalz, Ilan A. Malester, Irving J. Ostrich, Frank J. Millero

Ocean Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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 C_p and apparent molar heat capacities C_p,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)
Pages (from-to)	635-649
Number of pages	15
Journal	Journal of Solution Chemistry
Volume	21
Issue number	7
DOIs	https://doi.org/10.1007/BF00650758
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

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10.1007/BF00650758

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@article{f3e6f0ef751b47e4b0c3b1f7eebecfaf,

title = "Heat capacities of concentrated multicomponent aqueous electrolyte solutions at various temperatures",

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).",

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",

author = "Krumgalz, {Boris S.} and Malester, {Ilan A.} and Ostrich, {Irving J.} and Millero, {Frank J.}",

year = "1992",

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doi = "10.1007/BF00650758",

language = "English (US)",

volume = "21",

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journal = "Journal of Solution Chemistry",

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TY - JOUR

T1 - Heat capacities of concentrated multicomponent aqueous electrolyte solutions at various temperatures

AU - Krumgalz, Boris S.

AU - Malester, Ilan A.

AU - Ostrich, Irving J.

AU - Millero, Frank J.

PY - 1992/7/1

Y1 - 1992/7/1

N2 - 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).

AB - 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).

KW - CaCl

KW - KCl

KW - MgCl

KW - NaCl

KW - Specific and apparent molar heat capacities

KW - Young's rule

KW - artificial Dead Sea waters

KW - brines

KW - flow calorimetry

KW - mixed solutions

KW - multicomponent aqueous solutions

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U2 - 10.1007/BF00650758

DO - 10.1007/BF00650758

M3 - Article

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VL - 21

SP - 635

EP - 649

JO - Journal of Solution Chemistry

JF - Journal of Solution Chemistry

SN - 0095-9782

IS - 7

ER -