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Thermochemistry of (germanium + sulfur) II. Standard molar enthalpy of formation ΔfHom of germanium(II) sulfide GeS at the temperature T = 298.15 K determined by fluorine-bomb combustion calorimetry

✍ Scribed by Iwona Tomaszkiewicz; P.A.G. O'Hare

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
362 KB
Volume
26
Category
Article
ISSN
0021-9614

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Thermochemistry of (germanium + sulfur):
Thermochemistry of (germanium + sulfur): III. Massic energies of combustion in fluorine and the derived standard molar enthalpies of formation of crystalline and vitreous germanium(IV) disulfide GeS2at the temperatureT= 298.15 K. Standard molar enthalpy of the transition GeS2(cr) = GeS2(vit) atT= 298.15 K. Critical assessment of thermodynamic quantities for the high-temperature reaction: GeS2(cr) = GeS(g) + 12S2(g)
✍ P.A.G O’Hare; K.J Volin; S Susman 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 432 KB

new DfH°m (GeS,cr,298.15 K) obtained in Part II of this study (J. Chem. Thermodynamics 1994, 26, 727), yield several derived results for DfH°m(GeS2,cr,298.15 K) that are in reasonable agreement with the calorimetric determinations. The standard molar enthalpy of the transition: GeS2(vit) = GeS2(cr):

Thermodynamic properties of silicides: I
Thermodynamic properties of silicides: IV. Determination of the standard molar enthalpies of formation at the temperature 298.15 K of pentatungsten trisilicides of composition W5Si3and W5Si3.115by fluorine-combustion calorimetry
✍ Iwona Tomaszkiewicz; G.A. Hope; Charles M. Beck; II; P.A.G. O’Hare 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 429 KB

Two fully characterized specimens of pentatungsten trisilicide, nominally W5Si3, one believed to have been prepared by direct reaction of the elements in a sealed tube, and the other by arc melting, have been studied by fluorine-combustion calorimetry. Chemical analyses of the samples played a pivot