Thermal Decomposition of Sodium Carbonate Decahydrate
Na2CO3·10H2O → Na2CO3 + 10H2O
Overview
Washing soda (sodium carbonate decahydrate) loses its water of crystallization when heated. This dehydration reaction produces anhydrous sodium carbonate (soda ash). The hydrated crystals are transparent but become opaque white powder as water is driven off (efflorescence).
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Product | Sodium Carbonate Na₂CO₃ | 1 | (s) |
| Product | Water H₂O | 10 | (g) |
Everyday Example
When washing soda crystals are left in dry air, they slowly lose water and turn into a white powder through this efflorescence process.
Industrial Importance
Anhydrous sodium carbonate (soda ash) is a major industrial chemical used in glass manufacturing, detergents, water treatment, and as a chemical feedstock.
Properties
- Type
- Decomposition
- Reversible
- Yes
- Energy
- Endothermic
- ΔH
- 155.0 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 Sodium Carbonate Decahydrate?
The balanced equation is: Na₂CO₃·10H₂O → Na₂CO₃ + 10H₂O.
What type of reaction is Thermal Decomposition of Sodium Carbonate Decahydrate?
Thermal Decomposition of Sodium Carbonate Decahydrate is a decomposition reaction. It is reversible under certain conditions.
Is Thermal Decomposition of Sodium Carbonate Decahydrate exothermic or endothermic?
Thermal Decomposition of Sodium Carbonate Decahydrate is endothermic (absorbs energy). The enthalpy change (ΔH) is 155.0 kJ/mol.