Term: standard conditions for gases
https://doi.org/10.1351/goldbook.S05910

Definition:
Temperature, 273.15 K (0°C) and pressure of 10E5 pascals. IUPAC recommends that the former use of the pressure of 1 atm as standard pressure (equivalent to 1.01325 x 10E5 Pa) should be discontinued.

Related Terms:
1) standard pressure (http://doi.org/10.1351/goldbook.S05921).
2) stp (http://doi.org/10.1351/goldbook.S06036).

Source: PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2216 (https://doi.org/10.1351/pac199062112167)

Citation: 'standard conditions for gases' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05910

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