what is exothermic reaction ? is there any Indian who learning in class 10 th like to me became a good friend ,

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. ... Most of the spectacular chemical reactions that are demonstrated in classrooms are exothermic and exergonic.

An exothermic reaction is a reaction that produces energy in the form of heat and gives out heat to its surroundings. Therefore it doesn't take energy from its surroundings but gives it.

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