Question

Explain, giving one simple example of the following chemical changes

Thermal dissociation

Answer 1

Decomposition reaction:

• t is a chemical reaction in which a chemical compound decomposes to give two or more new substances.
• Usually decomposition reactions require external agents like heat, light, electricity, etc.

Thermal dissociation:

• It is the decomposition reaction that is brought about by heat
• For example decomposition of potassium chlorate$\left({\mathrm{KClO}}_3\right)$ is thermal dissociation resulting in the formation of potassium chloride$\left(\mathrm{KCl}\right)$ and oxygen gas$\left({\mathrm{O}}_2\right)$.
• $\underset{\mathrm{Potassium}\mathrm{chlorate}}{2{\mathrm{KClO}}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{Potassium}\mathrm{chloride}}{2\mathrm{KCl}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}$