Vaporization Of Compounds And Alloys At High Temperatures Part XXIII. Thermochemical Study Of The Germanium Oxides Using A Mass Spectrometer -T he Dissociation Energy Of The Molecule GeO
Report Number: WADD TR 60-782 Part XXIII
Author(s): Drowart, J., Verhaegen, G., Colin, R., Degreve, F.
Corporate Author(s): Universite Libre de Bruxelles, Brussels, Belgium
Laboratory: Air Force Materials Laboratory
Date of Publication: 1964-09
Pages: 34
Contract: AF 61(052)-225
DoD Project: 7350
DoD Task: 735001
Identifier: AD0607511
Abstract:
The mass spectrometric study of the vaporization of the compounds GeO2 (hex) and GeO(am) and of the mixture GeO2(hex) + Ge(c) made it possible to establish their mode of vaporization: GeO2(hex) - GeO(g) + I/2O2(I) n GeO(am) - (GeO)n(g) (n=1, 2, 3)(II) n/2 GeO2(hex) + n/2 Ge(c) - (GeO)n(g) (n = 1, 2, 3)(III) The enthalpies of vaporization are: ΔH°298(I) = 121.2±1.6 kcal/ mole ΔH°298(II, n = 1) = 53.4±1.0 kcal/mole ΔH°298(III, n = 1) = 58.2±1.0 kcal/mole The polymerization energies are: ΔH°298(GeO-GeO) = 44.7±3.0 kcal/mole ΔH°298(GeO-GeO-GeO)= 88.5±5.0 kcal/mole Total pressures given in the literature were reinterpreted taking the presence of the polymers into account. The heat of formation of the metastable compound GeO(am) obtained is ΔH°f(GeO) = -59.6±0.7 kcal/mole. The dissociation energy of the gaseous molecule GeO D:(GeO) = 157.4±1.5 kcal/mole.
Provenance: IIT
Author(s): Drowart, J., Verhaegen, G., Colin, R., Degreve, F.
Corporate Author(s): Universite Libre de Bruxelles, Brussels, Belgium
Laboratory: Air Force Materials Laboratory
Date of Publication: 1964-09
Pages: 34
Contract: AF 61(052)-225
DoD Project: 7350
DoD Task: 735001
Identifier: AD0607511
Abstract:
The mass spectrometric study of the vaporization of the compounds GeO2 (hex) and GeO(am) and of the mixture GeO2(hex) + Ge(c) made it possible to establish their mode of vaporization: GeO2(hex) - GeO(g) + I/2O2(I) n GeO(am) - (GeO)n(g) (n=1, 2, 3)(II) n/2 GeO2(hex) + n/2 Ge(c) - (GeO)n(g) (n = 1, 2, 3)(III) The enthalpies of vaporization are: ΔH°298(I) = 121.2±1.6 kcal/ mole ΔH°298(II, n = 1) = 53.4±1.0 kcal/mole ΔH°298(III, n = 1) = 58.2±1.0 kcal/mole The polymerization energies are: ΔH°298(GeO-GeO) = 44.7±3.0 kcal/mole ΔH°298(GeO-GeO-GeO)= 88.5±5.0 kcal/mole Total pressures given in the literature were reinterpreted taking the presence of the polymers into account. The heat of formation of the metastable compound GeO(am) obtained is ΔH°f(GeO) = -59.6±0.7 kcal/mole. The dissociation energy of the gaseous molecule GeO D:(GeO) = 157.4±1.5 kcal/mole.
Provenance: IIT