Question

From the above diagram, which labeled arrow (A,B,C&D) represents the activation energy for the reverse reaction?

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is B B

Activation energy may also be defined as the minimum energy required to start a chemical reaction. The activation energy of a reaction is usually denoted by $E_a$ and given in units of kilojoules per mole $\left(kJ/mol\right)$ or kilocalories per mole $\left(kcal/mol\right)$.

For the reverse reaction, $C+D⟶A+B$

Energy required is the height from products to peak $=B$