Molar Volume of an Ideal Gas

The volume one mole of ideal gas occupies at standard conditions: the 22.4 litres of school chemistry.

Specifications & Metrics

symbol

Vm

status

Exact — exact via the 2019 SI

value

0.02241396954 m³·mol⁻¹

Relative Scale in Constants

Core Principles & Analysis

• Exactly 22.414 litres per mole at 0 °C and one atmosphere in the 2019 SI.
• Follows from the ideal gas law the moment a mole is fixed by definition.
• Real gases deviate by a few parts per thousand, which is how intermolecular forces were first measured.