A flash photolysis system has been used to study the rate of reaction (1), OH + CH 4 → CH 3 + H 2 O, using time‐resolved resonance absorption to monitor OH. The temperature was varied between 300 and 900°K. It is found that the Arrhenius plot of k 1 is strongly curved and k 1 ( T ) can best be represented by the expression The apparent Arrhenius activation energy changes from 15±1 kJ/mole at 300°K to 32±2 kJ/mole at 1000°K. On either side of our temperature range, both absolute rates and their temperature dependence are in good agreement with the results from most previous investigations.
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Zellner et al. (1976) studied this question.
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