Answer to Question #159346 in Physical Chemistry for Han

Question

The following mechanism is for gas phase pyrolysis of methane:       

 CH4= ∙CH3 + ∙H

∙CH₃ + CH₄        =      C₂H₆ + ∙H

∙H + CH₄        =      ∙CH₃ + H₂

   H + ∙CH₃ + M         =     CH₄ + M

 Derive the rate law for the formation of C₂H₆ 

Answer 1

Rate expression = ( .CH₃ )⁰ × ( .CH₃ )⁰ .

That is this zero order reaction .