Question

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

Answer 1

• There are two types of chemical reactions in relation to the give and take of the heat.
• The reactions in which heat is absorbed along with the reactant are called endothermic reactions. The liberation of heat is denoted by the symbol $\text{'}∆\text{'}$on the reactant side above the arrow.

For example: ${\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\stackrel{}{\left(\mathrm{g}\right)\stackrel{∆}{\to }}2\mathrm{NO}\left(\mathrm{g}\right)$

Therefore, reactions in which energy is absorbed are known as endothermic reactions.