Knudsen effusion studies were conducted on CdO(s) in fused‐SiO2 Knudsen cells from 889 to 1110 K. The orifice size was varied; the largest cell orifice yielded a calculated pressure significantly lower than could be accounted for by experimental error. Average‐slope‐ and average‐free‐energy‐function‐based values of ΔHc298 were 86.9 ± 1.1 and 88.8 ± 0.5 kcal/mol, respectively. The data from the present work were combined with those of previous investigators using a method discussed by McCreary and Thorn; a ΔHc298 of 88.2 ± 0.2 kcal/mol was obtained. Using this combined value for ΔHc298 and ΔSc298= 51.40 ± 0.1 eu (obtained from the literature), the equilibrium constant for the reaction CdO(s)= Cd(g)+ 1/2 O2(g) at 900 to 1380 K was calculated to be log K = 10.6‐18,800(I/T). Copyright © 1974, Wiley Blackwell. All rights reserved
R. TOM COYLE and G. Lewis, "Knudsen Effusion Study Of The Vaporization Of CdO(s)," Journal of the American Ceramic Society, vol. 57, no. 9, pp. 398 - 400, Wiley, Jan 1974.
The definitive version is available at https://doi.org/10.1111/j.1151-2916.1974.tb11421.x
Materials Science and Engineering
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01 Jan 1974