Question

mention two each of exothermic and endothermic reaction?

Answer 1

Exothermic reactions: Those reactions in which energy is released in the form of heat are called exothermic reactions.

Examples –

(1) All combustion reactions e.g.

CH4 + 2O2 —> CO2 + 2H2O + Heat

(2) Thermite reactions e.g.

2Al + Fe2O3 —> 2Fe + Al2O3 + Heat

Combinations are generally exothermic in nature. The decomposition of organic matters into compost is an example of exothermic reaction.

Endothermic reactions: Those reactions in which energy is absorbed are called endothermic reactions.

Answer 2

Hello Dost ☺

Answer :

Exothermic reaction and endothermic reaction:

On the basis of energy changes during chemical reaction, they can be classified as

i) Exothermic reaction: A chemical reaction in which heat energy is produced.

Eg : C + O2 → CO2 (g) + heat

ii) Endothermic reaction: A chemical reaction in which heat energy is absorbed.

Eg : CaCO3 + Heat → CaO + CO2

Thanks ☺