(1) performed experiments at higher temperatures (2500–3500 K), finding an Arrhenius’ activation energy of 15.8 kcal mol –1. Thereby, a preferential product channel change was proposed by them to occur at temperatures around 500 K.
However, a more complicated temperature dependence pattern emerged for such rate constants, that is, decreasing slightly from 296 to 400 K and increasing more significantly between 500 and 873 K. (4) indicated no pressure dependence (between 5 and 80 Torr) for the rate constant of reaction 1 at room temperature, with a value of (2.05 ± 0.15) × 10 –12 cm 3 particle –1 s –1. More than a decade later, experimental investigations done by Mehlmann et al.
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