Question

why is respiration considered an exothermic reaction explain​

Answer 1

Because, breakdown of Glucose occurs during the process of Respiration which results in the liberation of Heat. So, for this sake, Respiration is considered as Exothermic Reaction.

Answer 2

Explanation:

Respiration is another exothermic reaction. and this reaction releases energy. However, energy is usually transferred as heat energy, so one way to tell if a chemical reaction is happening is to use a thermometer. If the temperature increases during a chemical reaction then that is an exothermic reaction.