Article,

Thermodynamic Properties of the NaCl+Hsub 2O System. II. Thermodynamic Properties of NaCl(aq), NaCl center-dot 2Hsub 2(cr), and Phase Equilibria

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Journal of Physical and Chemical Reference Data, 21 (4): 793-829 (1992)
DOI: 10.1063/1.555915

Abstract

Equations that described the thermodynamic properties of the NaCl+H2O system were obtained from a fit to experimental results for this system. The experimental results included in the fit spanned the range of temperature of approximately 250 to 600 K and, where available, the range of pressure from the vapor pressure of the solution to 100 MPa. New equations and/or values for the following properties are given in the present work: 1) DeltafG<sup>0</sup><sub>m</sub> and DeltafH<sup>0</sup><sub>m</sub>, for formation from the elements, for NaCl(cr) for 298.15 K and 0.1 MPa, 2) DeltafG<sup>0</sup><sub>m</sub> and DeltafH<sup>0</sup><sub>m</sub> from the elements, as well as S<sup>0</sup><sub>m</sub> and C<sup>0</sup><sub>p,m</sub>, all for 298.15 K, 0.1MPa, for NaCl·2H2O(cr), 3) the change in chemical potential for both NaCl and H2O in NaCl(aq) as a function of temperature, pressure, and molality, valid from 250 to 600 K and, where available, from the vapor pressure of the solution to 100 MPa. Comparison of the accuracies of experimental methods, where possible, has also been performed.

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