Accession Number : AD0725757

Title :   Thermodynamic Properties of Organic Derivatives of the Lighter Elements.

Descriptive Note : Annual technical summary rept. (Final) 1 Mar 70-1 Mar 71,

Corporate Author : BUREAU OF MINES BARTLESVILLE OKLA BARTLESVILLE ENERGY RESEARCH CENTER

Personal Author(s) : Douslin,Donald R. ; Finke,Herman L. ; Good,William D. ; Harrison,Roland H. ; Messerly,John F.

Report Date : 01 MAR 1971

Pagination or Media Count : 25

Abstract : Strained small ring systems were investigated as possible group constituents in synthetic high energy fuels. Thermodynamic properties of cyclopropylamine and oxetane were determined from a comprehensive investigation of the heat capacities and heats of transition in condensed phases, the enthalpies of formation, and vapor pressure relations. Gibbs energies and equilibrium constant of formation were calculated for the gas phase at 298.15K. A comparison of the effects on enthalpy of formation of alkyl-substituted, aliphatic ring systems was made for cyclopropanes, cyclopentanes, and cyclohexanes. The enthalpy of combustion and formation was reported for six alkyl-substituted cyclopropanes. Vapor pressures and the enthalpy of vaporization were determined for 1,2-diaminoethane. (Author)

Descriptors :   (*CYCLOPROPANES, *THERMODYNAMICS), (*ETHYLENEDIAMINE, *VAPOR PRESSURE), (*AMINES, THERMODYNAMICS), FREE ENERGY, HEAT OF FORMATION, CALORIMETRY, HEAT OF COMBUSTION, OXYGEN HETEROCYCLIC COMPOUNDS, MELTING POINT

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE