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Thermodynamic properties of liquid Zn-Ga solutions, analysis of error caused by side reactions

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Abstract

The thermodynamic properties of Zn-Ga solutions in the temperature range of 714 to 877 K and concentration range of zinc XZn = 0.01 to 0.9 molar fraction were determined by the emf method using concentration cells with liquid electrolyte and electrodes. The lower values of both\(\Delta \bar H_{Zn} \) and\(\Delta \bar S_{Zn} \) were obtained from slopes. Also the lower value of the integral molar enthalpy ΔH was determined by means of Krupkowski’s formulas in comparison with calorimetric data. The influence of side reactions, especially when the components of investigated alloys are close to zinc in the electromotive series, may lead to considerable errors in estimation of partial values of thermodynamic functions. In this case, instead of electrochemical methods, vapor pressure measurements and, for ΔH, calorimetric data are recommended. The magnitude of error in activity was analyzed by Wagner and Werner’s method and compared with the statistical analysis of errors based on extensive experimental data.

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  1. Department of Theory of Metallurgical Processes, Institute for Metal Research, Polish Academy of Sciences, Krakow, Reymonta 25, Poland

    Z. Moser (Chairman)

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  1. Z. Moser
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Moser, Z. Thermodynamic properties of liquid Zn-Ga solutions, analysis of error caused by side reactions. Metall Trans 4, 2399–2405 (1973). https://doi.org/10.1007/BF02669382

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  • DOI: https://doi.org/10.1007/BF02669382

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