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Enthalpy and free energy of formation of vanadium subnitride (VN0.465), 298 to 1,800K.

Authors
Pankratz-LB; Stuve-JM; Poppleton-HO; Oden-LL; Mah-AD
Source
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7585, 1971 Jan; :1-13
Link
NIOSHTIC No.
10008825
Abstract
Low-temperature heat capacities, high-temperature enthalpy increments, and the enthalpy of formation at 298 deg K were determined calorimetrically for vanadium subnitride (VN0.465). The low-temperature investigation gave s deg 298.15 = 6.379 +/- 0.005 cal/deg mole, and a combustion calorimeter investigation provided AHF deg 298.15 = -31.80 +/- 0.60 Kcal/mole. The two quantities were combined with the high-temperature data to give standard values of enthalpies of formation and free energies of formation above 298 deg K. These and related thermodynamic functions were tabulated to 1,800 deg K. Similar data are included in the range of 298 deg to 1,600 deg K for the mononitride, VN.
Keywords
Vanadium inorganic compounds; Thermodynamic properties; Nitrides; Gibbs free energy; Specific heat; Vanadium nitrides
Publication Date
19710101
Document Type
IH; Report of Investigations
Fiscal Year
1971
NTIS Accession No.
PB-205643
NTIS Price
A03
Identifying No.
RI-7585
NIOSH Division
ALRC
Source Name
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7585
State
OR
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