Chemistry - Chemical Kinetics Question with Solution | TestHub

${{\text{(E}}_{\text{a}}\text{)}}_{\text{r}}\text{=}{{\text{(E}}_{\text{a}}\text{)}}_{\text{f}}\text{+}\text{ΔE}\text{=}\text{15}\text{kcal}{\text{mol}}^{\text{-1}}{\text{+5kcalmol}}^{-\text{1}}$
$=20\text{kcal}{\text{mol}}^{-1}$.