Question

Why is respiration considered as an exothermic reaction???

Answer 1

glucose is burnt to give carbon dioxide, water and energy in form of adenosine triphospahte therefore it is condered to be exothermic

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