Question

Which statement is true about the potential energy diagram for an exothermic reaction?

Products have less potential energy than reactants.
The energy value remains the same throughout the diagram.
The graph starts at a lower energy value and ends at a higher energy value.
The potential energy of the products is equal to the potential energy of the reactants.

Answer 1

Answer:

Option A is the correct one.

Products have less potential energy than reactants

Hope it helps you :)☺

Answer 2

Answer:

Products have less potential energy than reactants.

In an endothermic reaction, the reaction mixture will absorb heat from the surroundings. Therefore, the products will have higher energy than the reactants and hence, ΔH will be positive.

In an exothermic reaction, the reaction mixture will release heat to the surroundings. Therefore, the products will have lower energy than the reactants and hence, ΔH will be negative.