Synthesis of Water

2H2 + O2 → 2H2O

Overview

Hydrogen gas reacts with oxygen gas to produce water. This highly exothermic reaction releases a large amount of energy and is one of the most fundamental chemical reactions known. It is the basis of hydrogen fuel cells and was the cause of the Hindenburg disaster.

Participants

Role Substance Coefficient State
Reactant Oxygen O 1 (g)
Reactant Hydrogen H 2 (g)
Product Water H₂O 2 (l)

Everyday Example

Hydrogen fuel cells in cars combine hydrogen and oxygen to produce electricity and water vapor as the only byproduct.

Industrial Importance

Used in hydrogen fuel cell technology for clean energy generation. Also important in rocket propulsion where liquid hydrogen and oxygen serve as propellants.

Properties

Type
Synthesis
Reversible
No
Energy
Exothermic
ΔH
-571.6 kJ/mol

Related Reactions

Fischer-Tropsch Synthesis (General) Formation of Aluminum Oxide Formation of Ammonia (Haber Process) Formation of Barium Oxide Formation of Barium Sulfate Formation of Beryllium Oxide Formation of Cadmium Oxide Formation of Calcium Carbonate from Oxides Formation of Calcium Hydroxide Formation of Calcium Oxide (Quicklime)

Frequently Asked Questions

What is the equation for Synthesis of Water?
The balanced equation is: 2H₂ + O₂ → 2H₂O.
What type of reaction is Synthesis of Water?
Synthesis of Water is a synthesis reaction.
Is Synthesis of Water exothermic or endothermic?
Synthesis of Water is exothermic (releases energy). The enthalpy change (ΔH) is -571.6 kJ/mol.