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Thermodynamic properties of silicides V. Fluorine-combustion calorimetric determination of the standard molar enthalpy of formation at the temperature 298.15 K of trimolybdenum monosilicide Mo3Si, and a critical assessment of its thermodynamic properties

✍ Scribed by Iwona Tomaszkiewicz; G.A. Hope; Charles M. Beck II; P.A.G. O'Hare

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 451 KB
Volume: 28
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1996.0005

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Thermodynamic properties of silicides. V

Thermodynamic properties of silicides. VI. Pentamolybdenum trisilicide (Mo5Si3). Fluorine combustion calorimetric determination of the standard molar enthalpy of formation at the temperature 298.15 K

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Fluorine bomb combustion calorimetric measurements of the energy of the reaction: V 3 Si(cr) + (19/2)F 2 (g) = 3VF 5 (g) + SiF 4 (g), have given a value of -(163.3 ± 6.9) kJ • mol -1 for the standard molar enthalpy of formation f H o m (V 3 Si, cr) at T = 298.15 K and p o = 101.325 kPa. This result

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

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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

Thermodynamic properties of vanadium sil

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The massic energy of combustion of vanadium disilicide in fluorine according to the reaction VSi 2 (cr) + (13/2)F 2 (g) = VF 5 (g) + 2SiF 4 (g) has been measured calorimetrically. On the basis of the derived molar enthalpy of reaction and the standard molar enthalpies of formation f H o m of VF 5 (g

Thermodynamic properties of silicides. I

Thermodynamic properties of silicides. III. Specific energy of combustion in fluorine of a hyperstoichiometric molybdenum disilicide. The standard molar enthalpy of formation ΔfHom of MoSi2.067±0.002 at the temperature 298.15 K

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A fluorine bomb calorimetric determinati

A fluorine bomb calorimetric determination of the standard molar enthalpy of formation of silicon disulfide SiS2(cr) at the temperature 298.15 K. Enthalpies of dissociation of Si–S bonds

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A synthesis of high-purity silicon disulfide SiS2 is described, and the F.t.-Raman spectrum of the solid is reported for the first time. The standard massic energy of reaction of SiS2(cr) with fluorine was measured in a bomb calorimeter. The combustion reaction was shown to proceed as follows: SiS2(