An Experimental Program for Obtaining the Thermodynamic Properties of Propellant Combustion Products
Abstract
The present best value for the heat of formation of gaseous BOF monomer at 298 K is -143 ! 3 kcal/mole. All temperature measurements above 1000 C are now made by observing the radiation emitted from a black body cavity in the bottom of the effusion cell. A determination of the dissociation pressure using the new arrangement yields the value -76.1 ! 2.1 kcal/mole for the heat of formation of crystalline AlN at 298 K, in good agreement with recent calorimetric values. Torsion-effusion studies of the vaporization of Li2O indicate that the gaseous Li2O molecule is more stable than previously believed. The vapor pressure and vapor molecular weight of crystalline MgCl2 were determined from torsion-Knudsen measurements. The heat of sublimation and heat of formation of Mg2Cl4 (g) at 298 K were derived as 63.3 ! 2 kcal/mole and -243. 5 ! 2 kcal/mole, respectively. Transpiration studies of the reaction of ZrO2 with gaseous HCl are being made in the 900 - 1400 K range.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1961
- Accession Number
- AD0268955
Entities
People
- D. L. Hildenbrand
- L. P. Theard