AN EXPERIMENTAL PROGRAM FOR OBTAINING THE THERMODYNAMIC PROPERTIES PROPELLANT COMBUSTION PRODUCTS
Abstract
Torsion vapor pressure studies on LiO and B2O3 were completed. For Li2O, pressures measured over the range 1480 to 1670 K are higher than calculated elemental decomposition pressures by a factor of about 2.7. The vapor pressure of B2O3 was measured in the range 1400 to 1570 K. A vibrational frequency assignment for B2O3 (g) based on matrix isolation spectra yields for the reaction B2O3 (1) equals B2O3 (g), an average third-law delta H(298) of 98.7 kcal/mole and a second-law value of 99.4 kcal/mole. A corresponding analysis using thermal functions based on vapor emission spectral data leads to secondand third-law delta H(298) values of 101.2 and 91.7 kcal/mole, respectively. The heat of formation of B2O3 (g) at 298 K is derived as -202.0 kcal/mole. The vaporization of BeF2 was studied by the torsion-effusion method in the range 810 to 945 K. Second- and third-law methods were used to derive the heat of sublimation of BeF2 at 298 K as 58.0 kcal/mole, leading to a heat of formation of -183.2 kcal/mole for BeF2 (g).
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1962
- Accession Number
- AD0273792
Entities
People
- D.l. Hildenbrand
- L.p. Theard
- N.d. Potter