Kinetics studies of the HO/sub 2/ + HO/sub 2/ and DO/sub 2/ + DO/sub 2/ reactions at 298/sup 0/K

Journal Article · Thu Apr 15 04:00:00 EST 1982 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100397a002· OSTI ID:6628468

Sander, S P ^[1]; Peterson, M; Watson, R T; Patrick, R

---

1. Jet Propulsion Lab., Pasadena, CA

The HO/sub 2/ + HO/sub 2/ and DO/sub 2/ + DO/sub 2/ reactions have been studied in the gas phase by using the flash photolysis-ultraviolet absorption technique. Measurements of k/sigma were made between 100 and 700 torr of He, Ar, N/sub 2/, O/sub 2/, and SF/sub 6/ to investigate the effect of different collision partners. A strong dependence of k/sigma on toal pressure was observed for each diluent gas with the rate constant being linearly related to the total pressure. The absolute absorption cross sections of both HO/sub 2/ and DO/sub 2/ were measured at 227.5 nm. The yield of H/sub 2/O/sub 2/ from the reaction was observed to be 0.50 +- 0.12 per molecule of HO/sub 2/ reacted, in agreement with the expected stoichiometry. The enhancement of the observed rate constant by water vapor was studied with the results in good agreement with previous investigations. Measurements were made of the DO/sub 2/ + DO/sub 2/ rate constant with a pressure effect similar to the HO/sub 2/ + HO/sub 2/ reaction being observed.

• OSTI ID: 6628468
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:8; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400600* -- Radiation Chemistry
ARGON
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DEUTERIUM
DILUTION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HELIUM
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROGEN PEROXIDE
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
NITROGEN
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
OXYGEN
OXYGEN COMPOUNDS
PEROXIDES
PEROXY RADICALS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PRESSURE DEPENDENCE
RADICALS
RARE GASES
REACTION KINETICS
STABLE ISOTOPES
SULFUR COMPOUNDS
SULFUR FLUORIDES
YIELDS