Question

Complete and balance the following equations giving the conditions necessary for the reaction:

${\mathrm{CaCO}}_3\stackrel{}{\to }\mathrm{\_\_\_\_\_\_}+\mathrm{\_\_\_\_\_\_}$

Answer 1

Thermal decomposition:

• It is a decomposition reaction brought about by heat.
• For example calcium carbonate(${\mathrm{CaCO}}_3$) undergoes thermal decomposition resulting in the formation of calcium oxide($\mathrm{CaO}$) and carbon dioxide(${\mathrm{CO}}_2$).
• $\underset{\mathrm{calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\stackrel{\mathrm{heat}}{\to }\underset{}{\underset{}{\underset{\mathrm{calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}}}+\underset{\mathrm{carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$