Synthesis of Nitric Oxide (Ostwald Process Step 1)

4NH3 + 5O2 → 4NO + 6H2O

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Ammonia NH₃ 4 (g)
Reaktant Oxygen O 5 (g)
Produkt Water H₂O 6 (g)

Alltägliches Beispiel

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

Industrielle Bedeutung

The Ostwald process produces virtually all of the world's nitric acid (about 60 million tonnes annually), which is essential for fertilizers, explosives, and chemical synthesis.

Eigenschaften

Typ
Synthesis
Reversibel
Nein
Energie
Exotherm
ΔH
-905,2 kJ/mol
Katalysator
Platinum-rhodium gauze

Verwandte Reaktionen

Formation of Nitrogen Dioxide Formation of Potassium Chloride Formation of Sodium Bicarbonate Formation of Sodium Peroxide Formation of Silicon Dioxide Formation of Tungsten Carbide Formation of Copper(II) Sulfide Formation of Sulfur Dioxide Formation of Hydrogen Sulfide Formation of Carbon Monoxide

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).