Question

In the energy diagram, which number represents the potential energy of the products?


(1)



(2)



(3)



(4)

Answer 1

I say Answer choice A because it is a straight line and it hasn't gone under all those reactions yet. 

Answer 2

Answer: (4)

Explanation: Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and $\Delta H$ for the reaction comes out to be positive.

Labeling of the parts in the diagram:

A represents the reactants.

B represents the products.

(1) represents the potential energy of the reactants.

(4) represents the potential energy of the products.

(2) represents the activation energy for the forward reaction.

(3) Represents the total enthalpy change for the reaction.