Abstract

Experimental results on the loss in weight of zinc oxide in a closed vessel under varying conditions of temperature, initial zinc pressure, oxygen pressure, and vacuum are reported. The data show more consistency interpreted in terms of dissociation rather than sublimation of the oxide. Plots of log10Kp versus 1/T and log10PZnO versus 1/T yield slopes corresponding to 24.0 ± 2.0 kcal and 43.0 ± 5.0 kcal, respectively. These results cannot be explained on the basis of available thermodynamic data. Interpretations of these results in terms of an unstable suboxide and non-equilibrium are discussed.

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