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Thermochemistry and kinetics of the Cl + O2 association reaction

✍ Scribed by J.M. Nicovich; K.D. Kreutter; C.J. Shackelford; P.H. Wine

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 655 KB
Volume: 179
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)85168-v

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✦ Synopsis

Laser flash photolysis of C1,/Oz mixtures has been employed in conjunction with Cl( 2P,,2) detection by time-resolved resonance fluorescence spectroscopy to investigate equilibration kinetics for the reactions C1+Oz +O,:ClOO+O, at temperatures of I8 I-200 K and O2 pressures of 15-40 Torr. The third-order rate coefftcient for the association reaction at 186.5 + 5.5 K is (8.9*2.9)X lo-"cm6 molecule-* s-' and the equilibrium constant (K,) at 185.4 K is 18.9 atm-' (factor of 1.7 uncertainty).

A third law analysis of our data leads to a value for the Cl-00 bond dissociation energy of 4.76 f0.49 kcal mol-'.

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