The dependence of rate constant of a reaction on temperature may be given as
                $\frac{\mathrm{d}\left(\ln \mathrm{K}\right)}{\mathrm{dT}}=\frac{{\mathrm{E}}_{\mathrm{a}}}{{\mathrm{RT}}^2}$
where E_a is activation energy for the reaction. For a reaction, the dependence of rate constant on temperature is given as
                ln K = 10 – $\frac{2500}{\mathrm{T}}$ + 3 ln T  
The activation energy of reaction is