Thermal Decomposition of Mercury(II) Oxide

2HgO → 2Hg + O2

概述

Mercury(II) oxide decomposes when heated to about 500 C into mercury metal and oxygen gas. This reaction is historically significant as it was used by Joseph Priestley in 1774 to discover oxygen. The red powder turns into shiny mercury droplets when heated.

参与者

角色 物质 系数 状态
产物 Oxygen O 1 (g)
产物 Mercury Hg 2 (l)

日常示例

This reaction is primarily of historical significance, demonstrating a fundamental chemical principle in the discovery of oxygen.

工业重要性

虽然该反应已不再工业应用，但它在化学史上具有重要地位，标志着氧气的发现和燃素说的终结。

属性

类型
Decomposition
可逆
是
能量
吸热
ΔH
181.6 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 Mercury(II) Oxide?
The balanced equation is: 2HgO → 2Hg + O₂.
What type of reaction is Thermal Decomposition of Mercury(II) Oxide?
Thermal Decomposition of Mercury(II) Oxide is a decomposition reaction. It is reversible under certain conditions.
Is Thermal Decomposition of Mercury(II) Oxide exothermic or endothermic?
Thermal Decomposition of Mercury(II) Oxide is endothermic (absorbs energy). The enthalpy change (ΔH) is 181.6 kJ/mol.