Question

Identify the type of chemical reaction:

Quicklime reacts vigorously with water releasing a large amount of heat.

Answer 1

1. A reaction in which heat is released after the process is called an exothermic reaction.
2. When calcium oxide $\left(\mathrm{CaO}\right)$ reacts with water, it forms calcium hydroxide$\left(\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\right)$.
3. During this reaction, a large amount of heat gets released.
4. So, this reaction is called an exothermic reaction.
5. Reaction can be written as: $\underset{\mathrm{Quick}\mathrm{lime}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Calcium}\mathrm{hydroxide}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{aq}\right)}+\mathrm{Heat}(∆)$ .