Question

8. [06.02]
On a potential energy diagram, what type of reaction will always have the reactants at a higher potential
energy than the products? (2 points)
O
Exothermic reaction
O
Endothermic reaction
Synthesis reaction
Single replacement reaction

Answer 1

Answer:

Exothermic reaction  

Explanation:

Consider the reaction

A + B ⟶ C

If energy is released, the product C is at a lower potential energy level than the reactants A and B (see diagram).

Conversely, the reactants A and B are at a higher energy level than the product.

B is wrong. In an endothermic reaction, the reactants A and B are at a lower energy level than the product.

C and D are both wrong. Both types of reaction can be exo- or endothermic.