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ERIC Number: EJ829543
Record Type: Journal
Publication Date: 2008-Sep
Pages: 3
Abstractor: As Provided
Reference Count: 9
ISBN: N/A
ISSN: ISSN-0021-9584
Birge-Sponer Estimation of the C-H Bond Dissociation Energy in Chloroform Using Infrared, Near-Infrared, and Visible Absorption Spectroscopy: An Experiment in Physical Chemistry
Myrick, M. L.; Greer, A. E.; Nieuwland, A. A.; Priore, R. J.; Scaffidi, J.; Andreatta, Danielle; Colavita, Paula
Journal of Chemical Education, v85 n9 p1276-1278 Sep 2008
The fundamental and overtone vibrational absorption spectroscopy of the C-H unit in CHCl[subscript 3] is measured for transitions from the v = 0 energy level to v = 1 through v = 5 energy levels. The energies of the transitions exhibit a linearly-decreasing spacing between adjacent vibrational levels as the vibrational quantum number increases. These data are used as the basis for Birge-Sponer estimation of the dissociation energy, D[subscript 0], for the C-H bond in chloroform. The value obtained from the first 5 transitions is D[subscript 0] = 459 plus or minus 8 kJ mol[superscript -1] (95% confident interval), compared to a literature value of the bond dissociation energy for this bond of 401 kJ mol[superscript -1]. The error of 14.5% results from sampling only the most harmonic energy levels in the vibrational potential well. (Contains 1 figure.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A