Thermal Decomposition of Potassium Permanganate

2KMnO4 → K2MnO4 + MnO2 + O2

Aperçu

Potassium permanganate, a deep purple crystalline solid, decomposes when heated above 240 C to form potassium manganate, manganese dioxide, and oxygen gas. This is one of the most visually striking decomposition reactions, as the purple solid transforms to green and brown products while releasing gas.

Participants

Rôle Substance Coefficient État
Produit Oxygen O 1 (g)

Exemple du quotidien

Potassium permanganate solution is used as an antiseptic wound wash and water purification agent in camping and survival situations.

Importance industrielle

Used in water treatment for taste and odor control, in analytical chemistry as an oxidant, and in organic synthesis. Understanding its decomposition is important for safe storage.

Propriétés

Type
Decomposition
Réversible
Non
Énergie
Endothermique
ΔH
171,0 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 Potassium Permanganate?
The balanced equation is: 2KMnO₄ → K₂MnO₄ + MnO₂ + O₂.
What type of reaction is Thermal Decomposition of Potassium Permanganate?
Thermal Decomposition of Potassium Permanganate is a decomposition reaction.
Is Thermal Decomposition of Potassium Permanganate exothermic or endothermic?
Thermal Decomposition of Potassium Permanganate is endothermic (absorbs energy). The enthalpy change (ΔH) is 171.0 kJ/mol.