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Why is respiration called an exothermic reaction?

Answer and explanation

Correct answer: Energy is released during the complete oxidation of glucose.

In respiration, glucose undergoes complete oxidation in the presence of oxygen and releases energy: \(\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{energy}\). Because energy is released, respiration is an exothermic reaction. Options B and C are true features of respiration, but they do not explain why the reaction is exothermic; the release of energy does.

Related tags

Class 10 ScienceChemical ReactionsRespirationExothermic ReactionGlucose Oxidation

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