Thermal decomposition of ethane gives mainly H2 + C2H4. In addition, small amounts of
CH4 are formed. The decay of the C2H6 concentration can be described by the reaction
steps
C2H6 -> CH3 + CH3 (1)
CH3 + C2H6 -> CH4 + C2H5 (2)
C2H5 -> C2H4 + H (3)
H + C2H6 -> C2H5 + H2 (4)
H + C2H5 -> C2H6 (5)
Using the steady-state approximations for the radicals [CH3],[C2H5], and [H], derive a rate law
describing the overall decay of [C2H6].
From the C โ H bond dissociation energies in C2H6 and C2H5, it is known that ๐๐3 โซ ๐๐1