Thermodynamics and Equilibrium Phase Diagrams of the Zinc Halide + Silver Halide Systems

Phase equilibrium diagrams for the systems zinc chloride + silver chloride and zinc bromide + silver bromide were determined by differential scanning calorimetry and X-ray diffraction methods, using high-purity materials and a glovebox for sample preparation. Both equilibrium phase diagrams are of t...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2004-09, Vol.49 (5), p.1231-1235
Main Authors: Wojakowska, Alina, Górniak, Agata, Wojakowski, Andrzej
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
General. Theory
Phase equilibria
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Summary:Phase equilibrium diagrams for the systems zinc chloride + silver chloride and zinc bromide + silver bromide were determined by differential scanning calorimetry and X-ray diffraction methods, using high-purity materials and a glovebox for sample preparation. Both equilibrium phase diagrams are of the simple eutectic type. The eutectic points are at 504 K, 53.5 mol % AgCl, and 551 K, 59.4 mol % AgBr, respectively. On the basis of the determined liquidus temperatures, the thermodynamic activities of components in liquid solutions ZnCl2 + AgCl and ZnBr2 + AgBr as well as the integral molar free enthalpies of mixing and the integral molar excess free enthalpies were calculated and discussed in terms of structure of molten salt mixtures.
ISSN:0021-9568
1520-5134
DOI:10.1021/je034207u