Falloff curves of the recombination reaction O + SO + M. -->. SO/sub 2/ + M in a variety of bath gases

Journal Article · Thu Apr 25 04:00:00 EST 1985 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100255a048· OSTI ID:5227050

Cobos, C J; Hippler, H; Troe, J

The recombination reaction O + SO + M ..-->.. SO/sub 2/ + M has been studied at room temperature by laser flash photolysis in a variety of 13 bath gases M. By variation of the pressure between 0.2 and 200 bar, major parts of the falloff curves were observed. A liming high-pressure rate coefficient of k/sub rec,infinity//(Ar) = 5.3 x 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/ and limiting low-pressure rate coefficients of k/sub rec,0/(Ar) = 5.1 x 10/sup -31/ cm/sup 6/ molecule/sup -2/s/sup -1/ and k/sub rec,0//(N/sub 2/) = 7.7 x 10/sup -31/ cm/sup 6/ molecule/sup -2/s/sup -1/ were obtained. A theoretical analysis of these data and SO/sub 2/ dissociation results suggests that excited electronic states of SO/sub 2/ contribute with a factor of 5-20 to the low- and high-pressure ranges of the reaction. Average energies transferred per collision <..delta..E> are derived from the low-pressure rate coefficients. For M = Ar, <..delta..E> probably does not markedly depend on the temperature between 300 and 5000 k. The indirectly derived <..delta..E> values from this work correspond to recently directly measured values after laser excitation. 57 references, 3 figures, 5 tables.

• Research Organization: Universitaet Goettingen, West Germany
• OSTI ID: 5227050
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 89:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
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ARGON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
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FLUIDS
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FLUORINE COMPOUNDS
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HALIDES
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HELIUM
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
INFORMATION
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KINETICS
KRYPTON
LASERS
LIGHT NUCLEI
MATHEMATICAL MODELS
METHANE
NEON
NITROGEN
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN
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PHOTOLYSIS
PROPANE
RARE GASES
REACTION KINETICS
RECOMBINATION
STABLE ISOTOPES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR FLUORIDES
SULFUR OXIDES
XENON