Thermal Decomposition of Ammonium Dichromate (Volcano Reaction)

(NH₄)₂Cr₂O₇ → Cr₂O₃ + N₂ + 4H₂O

Visão geral

Ammonium dichromate decomposes spectacularly when ignited, producing green chromium(III) oxide, nitrogen gas, and water vapor. The green fluffy chromium oxide rises like a miniature volcano as gases escape, making this one of the most dramatic chemistry demonstrations.

Participantes

Papel	Substância	Coeficiente	Estado
Produto	Nitrogen N	1	(g)
Produto	Water H₂O	4	(g)

Exemplo do cotidiano

This is the famous chemical volcano demonstration performed in science classes and science fairs worldwide.

Importância industrial

O óxido de crómio(III) produzido por esta e reações semelhantes é utilizado como pigmento verde (verde de crómio), em revestimentos de fita magnética e como composto de polimento.

Propriedades

Tipo: Decomposition
Reversível: Não
Energia: Exotérmico
ΔH: -315,0 kJ/mol

Reações relacionadas

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 Ammonium Dichromate (Volcano Reaction)?

The balanced equation is: (NH₄)₂Cr₂O₇ → Cr₂O₃ + N₂ + 4H₂O.

What type of reaction is Thermal Decomposition of Ammonium Dichromate (Volcano Reaction)?

Thermal Decomposition of Ammonium Dichromate (Volcano Reaction) is a decomposition reaction.

Is Thermal Decomposition of Ammonium Dichromate (Volcano Reaction) exothermic or endothermic?

Thermal Decomposition of Ammonium Dichromate (Volcano Reaction) is exothermic (releases energy). The enthalpy change (ΔH) is -315.0 kJ/mol.