Thermal Decomposition of Ammonium Dichromate (Volcano Reaction)

(NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O

概述

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.

参与者

角色 物质 系数 状态
产物 Nitrogen N 1 (g)
产物 Water H₂O 4 (g)

日常示例

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

工业重要性

氧化铬（三氧化二铬）用作绿色颜料、耐火材料和金属铬的冶炼原料，具有重要工业价值。

属性

类型
Decomposition
可逆
否
能量
放热
ΔH
-315.0 kJ/mol

相关反应

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.