Question

how to know that a reaction is exothermic or endothermic​

Answer 1

Answer:

if heat eveolve during reaction it means the reaction is exothermic if heat absorbs during reaction it means the reaction is endothermic

Answer 2

Heyy mate!

If in the reaction heat is given out then it is an exothermic rx. or if it takes in heat for the reaction to happen or in other words..if it has to be heated for the elements to react then it is an endothermic rx.

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