Question

What does one mean by exothermic and endothermic reactions? Give examples.

Answer 1

Exothermic reaction::

Reactions in which heat is released along with the formation of products are called exothermic chemical reactions.

Eg: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

 Endothermic reactions::

Reactions in which energy is absorbed are known as endothermic reactions.

Eg: 6CO₂ + 6H₂O(l) → C₆H₁₂O₆(aq) + 6O₂(g)