What happens when limestone is heated

Chemical reactions are part of our daily life. Today we will know what happens when limestone is heated. After reading this article, you will know which reaction takes place during the heating of limestone.

Let’s begin

When limestone is heated, it undergoes a thermal decomposition reaction which produces calcium oxide and carbon dioxide gas.

The balanced chemical equation for heating of limestone

 `CaCO3 \overset{\Delta]{\rightarrow}   CaO   +   CO2 ↑`

(limestone)       (quicklime) (carbon dioxide)

Heat is absorbed during the heating of limestone so the reaction is endothermic.

The rate of reaction depends on the temperature at which limestone is heated.

 

 

Uses of quicklime- Calcium oxide (quick lime) has the following uses

1.  Production of cement

2.  As a flux in the steel industries

3.  As a chemical reagent

 Check yourself

 

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FAQs

1. What is the formula of limestone?

Ans. – `CaCO_3`

2. What is the formula of quicklime?

Ans.-  `CaO`

3. What is the chemical equation for the thermal decomposition of limestone?

Ans.- `CaCO3 \overset{\Delta]{\rightarrow} CaO  + CO2 ↑`

4. What can we obtain by heating limestone?

Ans. – The heating of limestone produces quicklime and carbon dioxide.

5. Which gas is formed when limestone is heated?

Ans. – Carbon dioxide

6. What is the name of the process by which limestone is heated to produce quicklime?

Ans.- The process of heating limestone is known as ‘Calcination’.

7. Is heating of limestone a combination reaction?

Ans.- No, the heating of limestone is not a combination reaction.

8. Is the heating of limestone an exothermic reaction or an endothermic reaction?

Ans.- The heating of limestone is an endothermic reaction as limestone is decomposed after absorbing heat.

9. What is the chemical name of limestone?

Ans. - Calcium carbonate

10. What is the chemical name of quicklime?

Ans.-  Calcium oxide