Chemistry, asked by Anonymous, 8 months ago

What do you understand by exothermic reaction and endothermic reaction? Give one example of each type .

std 11 chemistry ​

Answers

Answered by meharchandanigunjan1
5

Answer:

Exothermic reactions are those reactions in which heat is released.

Reactants→products+heat

For example, formation of ammonia from nitrogenand hydrogen is an exothermic reaction.

 N2(g)+3H2(g)→2NH3(g)+92.2kJ

Endothermic reactions are those reactions in which heat is absorbed.

Reactants+heat→products

For example, dissociation of ammonia into nitrogenand hydrogen is an endothermic reaction.

 2NH3(g)+92.2kJ→

N2(g)+3H2(g)

Answered by DonutLord
6

Answer:

Exothermic reaction:

An exothermic reaction is a chemical reaction that produces heat(has a negative ΔH). In other words, the activation energy needed to initiate the reaction is less than the energy it releases.

Eg: Neutralization reactions, the Haber process, the thermite reaction, and combustion reactions.

Endothermic reaction:

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.

Eg: Ozone production, obtaining H₂S, dissolving a salt

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