Decomposition of Sodium Azide (Airbag Reaction)

2NaN₃ → 2Na + 3N₂

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Sodium Azide NaN₃	2	(s)
Produto	Sodium Na	2	(s)
Produto	Nitrogen N	3	(g)

Exemplo do cotidiano

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

Importância industrial

A azida de sódio é o componente-chave dos insufladores de airbags automóveis. São produzidos anualmente mais de 100 milhões de airbags. A velocidade e o volume de gás da reação são rigorosamente engenheirados para a segurança dos ocupantes.

Propriedades

Tipo: Decomposition
Reversível: Não
Energia: Exotérmico
ΔH: -42,6 kJ/mol

Reações relacionadas

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.