Question

what is exothermic and endothermic reactions?​

Answer 1

Answer:

An endothermic reaction is any chemical reaction that absorbs heat from its environment. The absorbed energy provides the activation energy for the reaction to occur. A hallmark of this type of reaction is that it feels cold.

An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.

Explanation:

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Answer 2

• Reaction in which energy is supplied is called endothermic reaction.
• Reaction in which energy is evolved is called exothermic reaction.