CBSE Class 10 Science Question 10 of 28

Chemical Reactions and Equations — Question 10

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Question 10

Why is respiration considered an exothermic reaction? Explain?

Answer

During digestion, food is broken down into simpler substances such as carbohydrates. These carbohydrates are broken down to form glucose. Glucose combines with oxygen in the cells and provides energy. The special name of this reaction is respiration.

As energy is released in this process, it is an exothermic process.

C6H12O6[Glucose] (aq)+6O2 (aq)6CO2 (aq)+6H2O (l)+energy\underset{\text{[Glucose]}}{\text{C}_6\text{H}_{12}\text{O}_6}\text{ (aq)} + 6\text{O}_2\text{ (aq)} \longrightarrow 6\text{CO}_2\text{ (aq)} + 6\text{H}_2\text{O}\text{ (l)} + \text{energy}