Question

Classify the following reaction into exothermic and endothermic reactions-

Reaction between carbon and oxygen.

Answer 1

1. Exothermic reactions: The chemical reactions during which heat (energy) is evolved are called exothermic reactions.
2. Endothermic reactions: The chemical reactions during which heat (energy) is absorbed during a reaction are called endothermic reactions.
3. Reaction between Glucose and oxygen: When Carbon (C) is burnt in oxygen$\left({\mathrm{O}}_2\right)$, Carbon dioxide (${\mathrm{CO}}_2$) is produced with the release of heat.

$$\begin{gathered} \mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right)+\mathrm{Heat} \\ \mathrm{Carbon}\mathrm{Oxygen}\mathrm{Carbon}\mathrm{dioxide} \end{gathered}$$

4. Hence, the reaction between carbon and oxygen is an exothermic reaction.