Thermal Decomposition of Sodium Carbonate Decahydrate

Na2CO3·10H2O → Na2CO3 + 10H2O

Aperçu

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

Rôle Substance Coefficient État
Produit Sodium Carbonate Na₂CO₃ 1 (s)
Produit Water H₂O 10 (g)

Exemple du quotidien

When washing soda crystals are left in dry air, they slowly lose water and turn into a white powder through this efflorescence process.

Importance industrielle

Anhydrous sodium carbonate (soda ash) is a major industrial chemical used in glass manufacturing, detergents, water treatment, and as a chemical feedstock.

Propriétés

Type
Decomposition
Réversible
Oui
Énergie
Endothermique
ΔH
155,0 kJ/mol

Réactions associées

Decomposition of Ammonium Nitrate Decomposition of Calcium Hypochlorite Decomposition of Carbonic Acid Decomposition of Iron(II,III) Oxide (Direct Reduction) Decomposition of Nitrous Oxide (Laughing Gas) Decomposition of Barium Peroxide Decomposition of Sodium Bicarbonate Decomposition of Water (Electrolysis) Thermal Decomposition of Copper(II) Carbonate Cracking of Octane (Thermal Cracking)

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.