Question

$\mathrm{Reaction}\to \mathrm{Product}-\mathrm{Q}\mathrm{kcal}.$ It is an ___________ reaction.

Answer 1

A chemical reaction that proceeds with the absorption of heat energy is called an endothermic reaction. It can be represented as follow-

• $\mathrm{Reactant}+\mathrm{Qkal}.\to \mathrm{Product}$

or

$\mathrm{Reactant}\to \mathrm{Product}-\mathrm{Qkal}$ [Here Q= heat energy absorbed]

• Example - ${\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2\mathrm{NO}\left(\mathrm{g}\right)-44\mathrm{kcal}$

Therefore $\mathrm{Reaction}\to \mathrm{Product}-\mathrm{Q}\mathrm{kcal}.$ It is an endothermic reaction.