Accession Number : AD0284153

Title :   DETERMINING THE HEAT OF FORMATION OF DECABORANE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : GAL'CHENKO,G.L. ; TIMOFEYEV,B.I. ; SKURATOV,S.M.

Report Date : 09 JUL 1962

Pagination or Media Count : 1

Abstract : Thermal decomposition of decaborane to B and H goes to completion at 700 to 800 degrees. A decaborane sample which had been repeatedly purified (to constant melting point) by vacuum sublimation was used. The substance was stored in a hermetically sealed weighing bottle. The standard heat of formation of crystalline decaborane from crystalline B and gaseous H was -14.0 ! 1.0 kcal/mole. This result is in agreement with the value -15.8 ! 1.4 kcal/mole cited in a recently published work by Johnson, Kilday and Prosen, J. Res. Natl. Bur. Stand., 64A:521, 1960. (Author)

Descriptors :   *DECABORANES, *HEAT OF FORMATION, BORON, CALORIMETERS, CRYSTALS, DECOMPOSITION, GASES, HYDROGEN, MEASUREMENT, PYROLYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE