Abstract
The rates of reaction of3Poxygen atoms with hydroxyl and hydrogen have been measured in a flow system at pressures around 2 mmHg. The former reaction, O + OH -> H + O2, ( — 4) occurred in the products of the rapid reaction between H and NO2, and was followed by measurements of atomic oxygen concentrations.k-4was found to be 5±2 x 10-11cm3molecule-1s-1at 265 and 293 °K. This result, when combined with data on the reverse reaction at elevated temperatures, gives a value ofk-4which is virtually independent of temperature and equal to about 1/20 of the bimolecular collision frequency. The reaction O + H2-> OH + H (3) was studied in the absence of molecular oxygen and found to have a rate constant of 6 x 10-13exp (-8900/RT) cm3molecule-1s-1in the range 409 to 733 °K. This is in good agreement with values obtained at higher temperatures. The rate constant for O + D2was significantly less than that for O + H2at temperatures between 491 and 671 °K.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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