Free Energies of Formation of Silver Sulfide and Lead Sulfide by Electromotive Force Measurements at High Temperature

1971 ◽  
Vol 118 (3) ◽  
pp. 419 ◽  
Author(s):  
W. T. Thompson ◽  
S. N. Flengas
Keyword(s):  
High Temperature ◽  
Lead Sulfide ◽  
Electromotive Force ◽  
Silver Sulfide ◽  
Free Energies ◽  
Force Measurements ◽  
Electromotive Force Measurements

Thermodynamic Properties of Zinc Chloride in Alkali Chloride Melts by Electromotive Force Measurements

1973 ◽  
Vol 51 (18) ◽  
pp. 3114-3122 ◽  
Author(s):  
Ron J. Robertson ◽  
Alfred S. Kucharski
Keyword(s):  
Thermodynamic Properties ◽  
Electromotive Force ◽  
Metal Salt ◽  
Alkali Metal Salt ◽  
Free Energies ◽  
Force Measurements ◽  
Acid Base ◽  
Alkali Chloride ◽  
Chloride Melts ◽  
Electromotive Force Measurements

Electromotive force measurements on the ZnCl2–ACl systems where A = K, Rb, and Cs were made using cells of the type[Formula: see text]in the temperature range 450° to 800 °C. The partial molar free energies, enthalpies, and excess entropies have been determined from the temperature dependence of the emf results. These thermodynamic properties exhibit increasing negative departure from ideality as the basicity of the alkali metal salt increases. The results are interpreted in terms of an acid–base reaction and are discussed in relation to current models.

Thermodynamic properties of multicomponent electrolyte solutions in mixed solvents. 5• HCl + NaCl + urea + water at 278.5–318.15 K

1988 ◽  
Vol 66 (4) ◽  
pp. 637-644 ◽  
Author(s):  
Dian-Yuan Men ◽  
Jia-Zhen Yang ◽  
Chun-Yu Liang ◽  
Li-Tian Zhang ◽  
Huan Gao ◽  
...  
Keyword(s):  
Mixed Solvents ◽  
Electrolyte Solutions ◽  
Absolute Temperature ◽  
Molar Enthalpy ◽  
Free Energies ◽  
Force Measurements ◽  
Solution Theory ◽  
Electrolytic Solution ◽  
Harned's Rule ◽  
Electromotive Force Measurements

This paper reports electromotive force measurements of the cells[Formula: see text]and[Formula: see text]in mixed solvents of urea, mole fraction x = 0.05, at five temperatures from 278.15 to 318.15 K. The standard potentials of Ag–AgCl electrode in mixed solvents were obtained from the emf of cell (A) for HCl of molality mA from 0.02 to 0.11 mol kg−1, both by extrapolation on the basis of an extended Debye–Hückel equation and by a polynomial approach proposed in this paper on the basis of Pitzer's electrolytic solution theory. The standard free energies of transfer for HCl are discussed. The activity coefficients of HClγA in HCl + NaCl + urea + water have also been obtained from the emf of cell (B) at constant total ionic strength I = 0.5, 1.0, 1.5, and 2.0 mol kg−1. The experimental results show that HCl obeys Harned's rule and log γA is a linear function of absolute temperature T. They also indicate that the relative partial molar enthalpy of HCl obeys a similar Harned's rule.

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