Answer
(D)
Explanation
In the energy profile diagram, the difference in the potential energy between reactant and product is called enthalpy Change (ΔH).
Mathematically, Enthalpy Change (ΔH) = Heat of the product (Hₚ) – Heat of reactant (Hᵣ).
That is, ΔH = Hₚ – Hᵣ
Considering the diagram given in the question, the difference between the potential energy of the products and the potential energy of the reactants is indicated by the letter (D).
