Differentiate between an exothermic and an endothermic reaction.

Endothermic releases heat and exothermic absorbs energy

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Exothermic releases heat and endothermic absorbs energy

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Hydrogen gas is evolved in exothermic but not in endothermic

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Hydrogen gas is evolved in endothermic but not in exothermic

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Solution

The correct option is B Exothermic releases heat and endothermic absorbs energy
The exothermic reaction releases heat energy into the surrounding system. The heat energy is released because the total energy of the product is less than the total energy of the reaction. However, in the case of endothermic reactions, heat is absorbed from the surrounding.
Hence, the correct option is $B$

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