STP standard temperature and pressure is used as a reference

Last updated: 4/30/2023

STP standard temperature and pressure is used as a reference point for the molar volume of an ideal gas In the USA most chemists most general chemistry texts and OWL use STP 0 C 1 atm where the molar volume 22 4 L mol If the reference pressure is chosen to be 1 bar the molar volume is 22 7 L mol Do not confuse the two A 0 80 mol sample of xenon gas occupies a volume of Visited L at STP