k1,k2 and k3 are given as rate constants of three steps of a complex reaction. Rate constant (k) of the overall reaction is given as k=√‌
k1k3
k2
Activation energies of the three steps are given as ‌Ea1=60kJmol−1,Ea2=30kJmol−1, ‌Ea3=10kJmol−1 From Arrhenius equation, we know that k=Ae−Ea∕RT If Ea is the activation energy of the overall reaction, then ‌Ea=‌