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

Autor/inn/en	Myrick, M. L.; Greer, A. E.; Nieuwland, A. A.; Priore, R. J.; Scaffidi, J.; Andreatta, Danielle; Colavita, Paula
Titel	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
Quelle	In: Journal of Chemical Education, 85 (2008) 9, S.1276-1278 (3 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Spectroscopy; Chemistry; Physics; Thermodynamics; Energy; Undergraduate Study; College Science; Laboratory Experiments; Hands on Science + Suchen Sie Ihr Suchwort? Spektroskopie; Chemie; Physik; Thermodynamik; Energie; Grundstudium; Laboratory work; Laborarbeit
Abstract	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.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10