The given reaction of \

     
The chemical reaction in which the heat is released is known as an Exothermic reaction.Examples are the burning of a candle and the reaction of a strong acid with water.

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Endothermic reactions:

The chemical reaction in which the heat is absorbed is known as an Endothermic reaction.Examples are melting ice cubes và melting solid salts.

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Given reaction is exothermic or endothermic

The given reaction is as follows:-

Ba(OH)2s+2NH4Cls→BaCl2s+2NH3g+2H2g

In this reaction, Barium hydroxide reacts with Ammonium chloride, formation of Barium chloride, ammonia, & hydrogen gas takes place.Reactions in which there is an exchange of ions between the reactants are called double displacement reactionThe given reaction is a double displacement reaction.In this reaction, heat is absorbed for the formation of the product.In an endothermic reaction, the ΔH is positive corresponding to the absorbed heat.

Hence, the given reaction is an endothermic reaction.

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