Abstract
Recent precise data on anomalous behavior of apparent molar properties of electrolyte solutions in near-critical steam have raised important questions as to how the thermodynamic properties of these systems should be described. Current Gibbs free energy models fail for highly compressible solutions. Here, a Helmholtz free energy formulation is presented as a first step in modeling compressible dilute aqueous electrolyte solutions. Comparisons are made with the known critical line, coexistence curves, apparent molar volumes, and heat capacities of NaCl in steam, and conclusions presented on improving the model.
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Gallagher, J.S., Levelt Sengers, J.M.H. Modeling the thermodynamic properties of sodium chloride in steam through extended corresponding states. Int J Thermophys 9, 649–661 (1988). https://doi.org/10.1007/BF00503233
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DOI: https://doi.org/10.1007/BF00503233