Thermal Decomposition of Ammonium Dichromate (Volcano Reaction)

(NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O

نظرة عامة

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.

المشاركون

الدور المادة المعامل الحالة
منتج Nitrogen N 1 (g)
منتج Water H₂O 4 (g)

مثال من الحياة اليومية

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

الأهمية الصناعية

Chromium(III) oxide produced by this and related reactions is used as a green pigment (chrome green), in magnetic tape coatings, and as a polishing compound.

الخصائص

النوع
Decomposition
قابل للعكس
لا
الطاقة
طارد للحرارة
ΔH
-315,0 kJ/mol

التفاعلات ذات الصلة

Decomposition of Calcium Hypochlorite Decomposition of Carbonic Acid Decomposition of Nitrous Oxide (Laughing Gas) Decomposition of Barium Peroxide Decomposition of Sodium Bicarbonate Decomposition of Water (Electrolysis) Decomposition of Silver Chloride (Photodecomposition) Thermal Decomposition of Lead(IV) Oxide Decomposition of Hydrogen Peroxide Decomposition of Ammonium Nitrate

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.