Dissociation Energy of the CH Radical
- 1 February 1964
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 40 (3) , 812-817
- https://doi.org/10.1063/1.1725210
Abstract
The 4300-Å band of CH has been observed in emission using a carbon furnace above 2400°C which contains 1 atm of H2 gas. From the CH emission intensity variation with temperature and a thermochemical cycle involving the heat of sublimation of graphite, a CH dissociation energy of 80±5 kcal (3.5±0.2 eV) is derived for the 2Π state. The close agreement between this value and that obtained previously from a CH rotational predissociation, establishes not only that the CH dissociation energy is 80.0 kcal (3.47 eV) but further confirms that the heat of sublimation of graphite is 169.58 kcal. For this 2Π state the atomic dissociation products are identified experimentally as ground-state C(3P) and H(2S) atoms. In addition, for the process C2H2=2CH an acetylene dissociation energy of 228.1 kcal is derived.Keywords
This publication has 17 references indexed in Scilit:
- The Reactions of Methylene. VI. The Addition of Methylene to Hydrogen and MethaneJournal of the American Chemical Society, 1962
- The Bakerian Lecture, The spectra and structures of free methyl and free methyleneProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1961
- High Temperature ChemistryAnnual Review of Physical Chemistry, 1956
- IntroductionPublished by American Chemical Society (ACS) ,1956
- Observation of the 4050 Band Group in a King FurnaceProceedings of the Physical Society. Section A, 1953
- The Heat of Formation of CN and the Dissociation Energies of N2 and C2N2Journal of the American Chemical Society, 1951
- Estimates of average bond energies and resonance energies of hydrocarbonsDiscussions of the Faraday Society, 1951
- Considerations Regarding Cometary and Interstellar Molecules.The Astrophysical Journal, 1942
- Wave Lengths of the CH Band LinesPublications of the Astronomical Society of the Pacific, 1940
- Considerations Regarding Interstellar MoleculesThe Astrophysical Journal, 1937