A thermal decomposition reaction can be defined as a decomposition reaction which is activated by thermal energy. In other words, a thermal decomposition reaction requires energy to be supplied to the reactants in the form of heat.
Decomposition of Calcium Carbonate
Decomposition of Calcium Carbonate is an example of thermal decomposition
CaCO3 → CaO + CO2
At 1200K, calcium carbonate decomposes to give carbon dioxide and calcium oxide. When heated, calcium carbonate decomposes into calcium oxide and carbon dioxide. This process is employed in the manufacturing of quick lime, which is an important substance in many industries.
Uses of Calcium Carbonate
- Calcium carbonate is largely employed in the pulp and paper industry. It can be used as a filter and pigment, making possible the production of a whiter, higher quality pigment than other minerals.
- In the construction industry, calcium carbonate is used as a filler in concrete, increasing its durability and appearance and to purify metals for use in construction applications.
- Another application of calcium carbonate is in fertilizers to provide calcium to plants and pH stabilization of the soil.
- Calcium carbonate can also be an additive to food products for livestock animals and humans and as a supplement in vitamins.