Question

Why is respiration considered an exothermic reaction? Explain.

Answer 1

For the sustenance of life we require energy. We obtain this  energy from our food. In the process of digestion, food molecules get converted into simpler substances such as, glucose. Then glucose combine with oxygen and provide energy to our body. The whole process is known as respiration. As because, energy is released during the process of respiration, so it is considered an exothermic reaction.

For example:-

C6H12O6 + 6O2 —> 6CO2 + 6H2O + energy


I hope this will help you

Answer 2

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Respiration is considered as an exothermic reaction because in respiration oxidation of glucose takes place which produces large amount of heat energy.

C6H12O6 (aq) + 6O2 (g) → 6CO2 (g) + 6H2O (l) + Energy