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Vaporization Of Compounds And Alloys At High Temperatures Part XII. Mass Spectrometric Determination Of The Dissociation Energies Of Gaseous InS, In2S and In2S2

Report Number: WADD TR 60-782 Part XII
Author: Colin, R.
Author: Drowart, J.
Corporate Author: Universite Libre de Bruxelles, Brussels, Belgium
Laboratory: AF Materials Laboratory
Date of Publication: 1963-09
Pages: 28
Contract: AF 61(052)-225
Project: 7350
Task: 735001
AD Number: AD0422039


Investigation of the saturated vapor above InS, In2S3 and In2S3+In samples and of the superheated vapor has yielded

In2S(g) 2In(g)+1/2S2(g) ΔH°298=98.2±5.0 kcal/mole
In2S2(g) In2S(g)+1/2S2(g) ΔH°298=26.5±6.0 " "
InS(g) In(g)+1/2S2(g) ΔH°298=17.4±4.0 " "

Combining these data with D°298(S2)=102.2±2.0 kcal/mole one obtains:

ΔH°298(at,In2S)=149.2±5.5; D°298(InS)=68.4±4.5;
ΔH°298(at.In2S2)=226.7±8.0; D°298(dim,InS)=89.9±11.0 kcal/mole.

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