Difference between exothermic and endothermic reactions

Exothermic and endothermic reactions are two types of chemical reactions that release or absorb energy, respectively. The main differences between these reactions can be summarized as follows:

Exothermic reactions

1. Exothermic reactions release energy in the form of heat to the surroundings.
2. These reactions usually result in a temperature increase in the surroundings.
3. Examples of exothermic reactions include combustion reactions, neutralization reactions, and many oxidation reactions.
4. Energy is a product in exothermic reactions.

Endothermic reactions

1. Endothermic reactions absorb energy from the surroundings.
2. These reactions typically result in a temperature decrease in the surroundings.
3. Examples of endothermic reactions include photosynthesis, thermal decomposition, and the dissociation of ammonium chloride.
4. Energy is a reactant in endothermic reactions.

In summary, the key distinction between exothermic and endothermic reactions lies in how they deal with energy: exothermic reactions release energy, while endothermic reactions absorb energy. Understanding these concepts is essential in various fields, especially in industries and environmental sciences where these types of reactions play crucial roles.