Question

What does one mean by exothermic and endothermic reactions? Give example.

Why is respiration considered an exothermic reaction? Explain.
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Answer 1

Answer:

Explanation:

An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.

Answer 2

Answer:

In exothermic reaction heat is evolved for e.g.:-

(i) C (s) + O2 (g) → CO2 (g) + Heat

(ii) N2 (g) + 3H2 (g) → 2NH3 (g) + Heat

In endothermic reaction, heat is absorbed for e.g.:-

(i) C (s) + 2S (s) → CS2 (l) – Heat

(ii) N2 (g) + O2 (g) → 2NO(g) – Heat