- Author
-
Manion, J. A.
|
Awan, I. A.
|
Tsang, W.
- Title
- Single Pulse Tube Study of C2Cl6 Decomposition: Are the Kinetics Consistent With the Proposed Thermochemistry of C2Cl6,CCl3 and C2Cl5?
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- Combustion Institute/Central States Section. Third (3rd) Joint Meeting of the U.S. Sections. Session A3: Kinetics III. Hosted by The Central States Section of the Combustion Institute and the University of Illinois at Chicago. March 16-19, 2003,
Chicago, IL,
A12/1-6 p.,
2003
- Keywords
-
kinetics
|
decomposition
|
thermochemistry
- Identifiers
- hindred-Gorin; hexachloroethane
- Abstract
- Single pulse shock tube studies of the thermal decomposition of hexachloroethane at temperatures of 960 - 1080 K and pressures of 130 -1,100 kPa have been carried our using the comparative rate technique. Decomposition proceeds via spitting of the C-C bond with about a 12% contribution from C-Cl bond fission. A 60% increase in the rate constant was observed over the pressures studied. Fall-off curves for the reaction were derived, and in conjunction with data from the RRKM model was developed that provides a good fit to the relevant kinetic data spanning 250 - 1080 K. The results support recently proposed changes to the heats of formation of highly chlorinated compounds and are consistent with δf H [CCI]₃, 298.15 K] = (71.2 3.5) kj mol⁻¹ and δf H[C₂Cl₅, 298.15 K] = 21.4 6.7) kJ mol⁻¹.