Kinetics of the Reaction H + Ch₄ = ch₃ + H₂

The reaction H + CH 4 = CH 3 + H 2 has been studied in the temperature range 99° to 163 °C. The rate constant is given by the expression k = 1.7 × 10 −14 exp (−4500/RT). The data are in agreement with the results, but not the interpretations, of previous work. The entropy of the methyl radical has been calculated for several temperatures.