AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper

Decomposition of ethane

d[C2H6]

dt

= k[C2H6] proceeds through a complex mechanism, which includes 5 steps. The overall rate constant (k) can be expressed as k =

k1k2k3

k2k5

where k1, k2, k3, k4, k5 are the rate constants of the 5 steps.
If the activation energies of each of the steps respectively are E1 = 1E, E2 = 2E, E3 = 3E, E4 = 4E, E5 = 5E, where E = 20 kJ/mol. Then find the overall activation energy of the decomposition.