Electrochemical Determination of the Gibbs Energy of Formation of Sphalerite (Zns).
NTIS: PB 288 152 :16 pages
The standard Gibbs energy, enthalpy, and entropy of formation sphalerite (zns) were determined at elevated temperatures by a high- temperature galvanic cell employing stabilized zirconia as the electrolyte. Pertinent data required to calculate the Gibbs energy of formation of zns as a function of temperature are given. A third- law analysis of the present data yield a standard enthalpy of formation, ahf deg 298.15 Of -63.65 +/- 0.70 Kcal/mole of sphalerite. Equilbrium oxygen pressures were measured for that portion of the zn-s-o-system where zno coexists with zns in a so2 atm of approximately 1 atm, and in the temperature range of 948 to 1,210k.
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