What does one mean by exothermic and endothermic reactions?

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In Exo is the heat given out and in Endo energy is absorbed.

In both cases heat is given out.

In both the cases heat is absorbed

Exothermic absorbs the energy, endothermic release the energy

answer is A.

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Detailed Solution

Concept- In an endothermic reaction the energy is absorbed in the form of heat from its surroundings. While is an exothermic reaction the energy is released to the surroundings. This is the main difference between both these reactions.
In exothermic Reaction responses in which heat is given out along with the products are called exothermic responses.
Example

C H 4 (g) + 2 O 2 (g) → C O 2 (g) + 2 H 2 O (g)

In endothermic Reaction responses in which energy is absorbed are known as endothermic responses.
The process of photosynthesis is an example of endothermic reaction.

6 C O 2 (g) + 6 H 2 O (g) → C 6 H 12 O 6 (a q) + 6 O 2 (g)

Hence, In Exothermic the heat is released and in endo thermic, the energy is absorbed
Hence, the correct option is 1.

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