Thermal Decomposition of Potassium Chlorate

2KClO3 → 2KCl + 3O2

概述

Potassium chlorate decomposes when heated (with MnO2 catalyst at ~200 C, or without catalyst at ~400 C) to form potassium chloride and oxygen gas. This reaction was historically used as a laboratory source of oxygen gas before compressed gas cylinders became widely available.

参与者

角色 物质 系数 状态
产物 Potassium Chloride KCl 2 (s)
产物 Oxygen O 3 (g)

日常示例

Safety matches contain potassium chlorate as the oxidizer, which decomposes and releases oxygen when struck to help ignite the match.

工业重要性

氯酸钾广泛用于烟火制品和火柴制造，也是实验室常用的氧气发生剂。历史上曾作为初级炸药使用，但已逐步被更安全的替代品取代。

属性

类型
Decomposition
可逆
否
能量
吸热
ΔH
89.4 kJ/mol
催化剂
Manganese dioxide (MnO₂)

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 Potassium Chlorate?
The balanced equation is: 2KClO₃ → 2KCl + 3O₂.
What type of reaction is Thermal Decomposition of Potassium Chlorate?
Thermal Decomposition of Potassium Chlorate is a decomposition reaction.
Is Thermal Decomposition of Potassium Chlorate exothermic or endothermic?
Thermal Decomposition of Potassium Chlorate is endothermic (absorbs energy). The enthalpy change (ΔH) is 89.4 kJ/mol.
What conditions are needed for Thermal Decomposition of Potassium Chlorate?
This reaction requires a catalyst (Manganese dioxide (MnO₂)).