Question

Energy of activation of forward and backward reaction are equal in cases (numerical values) where

• A. $\Delta H=0$
• B. no catalyst is present
• C. $\Delta S=0$
• D. none of the above

Answer 1

Answer: (A)

$\Delta H=0$

Energy of activation of forward and backward reaction are equal in cases (numerical values) where the enthalpy change of the reaction, $\Delta H=0$.

For exothermic reaction, $E_{act,b}=\Delta H+E_{act,f}$

For endothermic reaction, $E_{act,f}=\Delta H+E_{act,b}$