AN EXPERIMENTAL PROGRAM FOR OBTAINING THE THERMODYNAMIC PROPERTIES OF PROPELLANT COMBUSTION PRODUCTS
Abstract
Torsion-effusion studies of the vaporization of ZrF4 were completed. The results yield a condensation coefficient of about 0.08 and a heat of sublimation of 55.8 kcal/mole at 298 K. The heat of formation of ZrF4(g) at 298 K was derived as -401.1 ! 3 kcal/mole. Studies of the vaporization of ZrF4 in the presence of finely divided Zr indicate that lower fluorides are not formed under these conditions. The vapor pressures of AlF3 and a 1:1 mole ratio mixture of Li and Al fluorides were measured by the torsion-effusion method. A heat of sublimation at 298 K of 71.0 ! 0.5 kcal/mole was obtained for AlF3, from which the heat of formation of AlF3(g) at 298 K was derived as -285.3 ! 2 kcal/mole. The heat of formation of LiAlF4 at 298 K was derived as -447 ! 7 kcal/mole. Measurements of the dissociation pressure of AlN are in progress. The vaporization of Mg3N2 was studied from 1100 to 1260 K by the torsion method. A condensation coefficient of about 0.005 was indicated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1961
- Accession Number
- AD0258410
Entities
People
- D. L. Hildenbrand
- L. P. Theard