Question

What happens when calcium carbonate is heated?

Answer 1

Hi friend,
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Explanation :- when you heated the CaCo3 it breaks down to give calcium oxide and carbon dioxide gas

Reaction :- CaCo3-------> CaO + CO2

This reactions is also known as a decomposition reactions
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Answer 2

Calcium carbonate ( CaCO3 ) when heated strongly , gives quicklime ( CaO ) and carbon dioxide ( CO2) .

CaCO3 (s) ---heat----- CaO (s) + CO2(g)

CaCO3 - limestone (calcium carbonate)

CaO - Calcium oxide (quicklime)

CO2 - Carbon dioxide

Explanation -

This reaction is thermal decomposition reaction . Thermal decomposition reaction is a type of decomposition reaction in which heat is required to break the bonds present in the substance. Thus it is a Endothermic Reaction .