Question

Which plot represents for an exothermic reaction?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Exothermic reactions are those in which heat/energy is released during the formation of the product.
Due to release of energy, the following equation is always followed:
${\text{Energy}}_{\text{product}}<{\text{Energy}}_{\text{reactants}}$
In the given graphs, $H$ represents energy. According to each graph:
In graph $A:{\text{Energy}}_{\text{product}}<{\text{Energy}}_{\text{reactants }}$ is followed.
In graph $B:{\text{Energy}}_{\text{product }}>{\text{Energy}}_{\text{reactants }}$
In graph $C$ and $D:{\text{Energy}}_{\text{product}}={\text{Energy}}_{\text{reactants }}$