DETERMINING THE HEAT OF FORMATION OF DECABORANE,

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)

Document Details

Document Type
Technical Report
Publication Date
Jul 09, 1962
Accession Number
AD0284153

Entities

People

  • B.i. Timofeyev
  • G.l. Gal'chenko
  • S.m. Skuratov

Organizations

  • National Air and Space Intelligence Center

Tags

DTIC Thesaurus Topics

  • Agreements
  • Decomposition
  • Heat Energy
  • Heat Of Formation
  • Isothermal Processes
  • Melting
  • Melting Point
  • Phase Transformations
  • Standards
  • Sublimation
  • Thermodynamic Processes

Fields of Study

  • Chemistry

Readers

  • Analytical Mechanics
  • Combustion science or combustion engineering.
  • Strategic Security Studies