Thermal Decomposition of Magnesium Carbonate
MgCO3 → MgO + CO2
Overview
Magnesium carbonate decomposes when heated above 350 C to form magnesium oxide and carbon dioxide. This reaction occurs at a lower temperature than calcium carbonate decomposition because magnesium carbonate is less thermally stable. It is used in the production of magnesia for refractory applications.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Product | Magnesium Oxide MgO | 1 | (s) |
| Product | Carbon Dioxide CO₂ | 1 | (g) |
Everyday Example
Gymnasts and rock climbers use magnesium carbonate (chalk) on their hands, which is produced and processed using knowledge of this decomposition.
Industrial Importance
Magnesium oxide produced by this decomposition is used as a refractory material in furnace linings, as a medicine (antacid), and in magnesium metal production.
Properties
- Type
- Decomposition
- Reversible
- No
- Energy
- Endothermic
- ΔH
- 100.6 kJ/mol
Related Reactions
Cracking of Octane (Thermal Cracking)
Decomposition of Ammonium Nitrate
Decomposition of Barium Peroxide
Decomposition of Calcium Carbonate (Calcination)
Decomposition of Calcium Hypochlorite
Decomposition of Carbonic Acid
Decomposition of Hydrogen Peroxide
Decomposition of Iron(II,III) Oxide (Direct Reduction)
Decomposition of Nitroglycerin
Decomposition of Nitrous Oxide (Laughing Gas)
Frequently Asked Questions
What is the equation for Thermal Decomposition of Magnesium Carbonate?
The balanced equation is: MgCO₃ → MgO + CO₂.
What type of reaction is Thermal Decomposition of Magnesium Carbonate?
Thermal Decomposition of Magnesium Carbonate is a decomposition reaction.
Is Thermal Decomposition of Magnesium Carbonate exothermic or endothermic?
Thermal Decomposition of Magnesium Carbonate is endothermic (absorbs energy). The enthalpy change (ΔH) is 100.6 kJ/mol.