for geometric product specifications Reference atmospheric model Room temperature Standard sea-level conditions Standard state Explanatory notes References External links "Standard conditions for gases" from the IUPAC Gold Book. "Standard pressure" from the IUPAC Gold Book. "STP" from the IUPAC Gold Book. "Standard state" from the IUPAC Gold Book. Atmospheric thermodynamics Aerodynamics Engineering thermodynamics Gases Measurement Physical chemistry Standards Thermodynamics