Title

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

Date

1964

Index Abstract

Contrails and DTIC

Photo Quality

Not Needed

Report Number

WADD TR 60-782 Part XXIII

Creator

Drowart, J.

Verhaegen, G.

Colin, R.

Degreve, F.

Corporate Author

Universite Libre de Bruxelles, Brussels, Belgium

Laboratory

Air Force Materials Laboratory

Extent

34

NTRL Accession Number

AD607511

Identifier

AD0607511

AD0607511

Access Rights

OTS

Distribution Classification

1

Contract

AF 61(052)-225

DoD Project

7350

DoD Task

735001

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Full text available

Date Issued

1964-09

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.

Publisher

Wright-Patterson Air Force Base, OH : Air Force Materials Laboratory, Research and Technology Division, Air Force Systems Command

Distribution Conflict

No

Provenance

IIT

Type

report

Subject

Thermochemistry

Mass Spectroscopy

Vaporization

Vapor Pressure

Enthalpy

Germanium Compounds

Belgium

Dioxides

Disproportionation

Dissociation

Heat Of Formation

Heat Of Sublimation

Monoxides

Oxides

Polymerization

Stability

Format

1 online resource