Decomposition of Sodium Azide (Airbag Reaction)

2NaN3 → 2Na + 3N2

概述

Sodium azide rapidly decomposes when ignited to produce sodium metal and nitrogen gas. This extremely fast reaction (completing in about 40 milliseconds) is the primary gas-generating reaction in automobile airbags. The large volume of nitrogen gas produced instantly inflates the airbag.

参与者

角色 物质 系数 状态
反应物 Sodium Azide NaN₃ 2 (s)
产物 Sodium Na 2 (s)
产物 Nitrogen N 3 (g)

日常示例

When you see an airbag deploy in a car crash, the bag is inflated by nitrogen gas from the rapid decomposition of sodium azide.

工业重要性

叠氮化钠是汽车安全气囊充气装置的关键成分。每年生产超过1亿个安全气囊。反应的速度和气体体积经过精确设计以保障乘员安全。

属性

类型
Decomposition
可逆
否
能量
放热
ΔH
-42.6 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 Decomposition of Sodium Azide (Airbag Reaction)?
The balanced equation is: 2NaN₃ → 2Na + 3N₂.
What type of reaction is Decomposition of Sodium Azide (Airbag Reaction)?
Decomposition of Sodium Azide (Airbag Reaction) is a decomposition reaction.
Is Decomposition of Sodium Azide (Airbag Reaction) exothermic or endothermic?
Decomposition of Sodium Azide (Airbag Reaction) is exothermic (releases energy). The enthalpy change (ΔH) is -42.6 kJ/mol.