Enthalpy and free energy of formation of vanadium subnitride (VN0.465), 298 to 1,800K.
Pankratz-LB; Stuve-JM; Poppleton-HO; Oden-LL; Mah-AD
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7585, 1971 Jan; :1-13
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.
Vanadium inorganic compounds; Thermodynamic properties; Nitrides; Gibbs free energy; Specific heat; Vanadium nitrides
IH; Report of Investigations
NTIS Accession No.
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7585