Thermal Decomposition of Ammonium Dichromate (Volcano Reaction)

(NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O

概要

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.

参加者

役割 物質 係数 状態
生成物 Nitrogen N 1 (g)
生成物 Water H₂O 4 (g)

日常の例

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

産業上の重要性

この反応や関連反応で生成される酸化クロム(III)は、緑色顔料（クロムグリーン）、磁気テープコーティング、研磨剤として使用される。

特性

タイプ
Decomposition
可逆的
いいえ
エネルギー
発熱性
ΔH
-315.0 kJ/mol

関連する反応

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.