THERMODYNAMIC PROPERTIES OF ROCKET COMBUSTION PRODUCTS
Abstract
REACTION OF WATER VAPOR WITH THE Ta heat shields is responsible for H production. A new reaction cell, also made of W, is described. Mass spectrometric studies of the BeO-H2O systemAT 1938 K, showed no detectable amounts of gaseous OH species present. A lower limit of -181 kcal/mole for the heat of formation of Be(OH)2 (g) at 298 K was derived. A mixture of Be metal and BeO in the mass spectrometer gave evidence for the presence of Be(g) in the effusing vapor at temperatures up to 1800 K. Mass spectra for the Be-BeO mixture in the presence of water vapor contained no measurable intensities of BeOH+ at 1800 K. A lower limit of -21 kcal/mole was derived for the heat of formation of BeOH(g) at 289 K. A table of thermodynamic functions for condensed BeO was compiled. The vapor pressure of crystalline BeF2 was measured by the torsion-effusion method over the range of 810 to 925 K. Average of second and third law values of the heat of sublimation of BeF2 at 298 K is 58.0 + or -2 kcal/mole. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1962
- Accession Number
- AD0271508
Entities
People
- D.l. Hildenbrand
- L.p. Theard