Question

Explain, giving one simple example for the following chemical change :

Thermal dissociation

Answer 1

Part 1: Thermal dissociation reaction:

• A chemical reaction in which one reactant breaks down into two or more products with the supply of heat is known as a thermal dissociation reaction.
• A thermal decomposition reaction requires energy to be supplied to the reactants in the form of heat.

Part 2: Example of thermal dissociation reaction:

• An example of a thermal dissociation reaction is when Calcium carbonate is heated, it decomposes into Calcium oxide and Carbon dioxide.
• $\underset{\mathrm{Calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$