Synthesis of Nitric Oxide (Ostwald Process Step 1)

4NH3 + 5O2 → 4NO + 6H2O

Visão geral

Ammonia is catalytically oxidized over a platinum-rhodium gauze at 850 C to form nitric oxide and water. This is the first and critical step of the Ostwald process for nitric acid production. The catalyst operates at about 95% selectivity for NO.

Participantes

Papel Substância Coeficiente Estado
Reagente Ammonia NH₃ 4 (g)
Reagente Oxygen O 5 (g)
Produto Water H₂O 6 (g)

Exemplo do cotidiano

The nitric acid used in fertilizer production and numerous industrial processes begins with this reaction.

Importância industrial

O processo de Ostwald produz praticamente todo o ácido nítrico do mundo (cerca de 60 milhões de toneladas anuais), essencial para fertilizantes, explosivos e síntese química.

Propriedades

Tipo
Synthesis
Reversível
Não
Energia
Exotérmico
ΔH
-905,2 kJ/mol
Catalisador
Platinum-rhodium gauze

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Frequently Asked Questions

What is the equation for Synthesis of Nitric Oxide (Ostwald Process Step 1)?
The balanced equation is: 4NH₃ + 5O₂ → 4NO + 6H₂O.
What type of reaction is Synthesis of Nitric Oxide (Ostwald Process Step 1)?
Synthesis of Nitric Oxide (Ostwald Process Step 1) is a synthesis reaction.
Is Synthesis of Nitric Oxide (Ostwald Process Step 1) exothermic or endothermic?
Synthesis of Nitric Oxide (Ostwald Process Step 1) is exothermic (releases energy). The enthalpy change (ΔH) is -905.2 kJ/mol.
What conditions are needed for Synthesis of Nitric Oxide (Ostwald Process Step 1)?
This reaction requires a catalyst (Platinum-rhodium gauze).