there's the concept of "standard temperature and pressure" , "stp" , which iirc is 0 celcius at the same pressure as there is at sea level. Room temperature me

there's the concept of "standard temperature and pressure" , "stp" , which iirc is 0 celcius at the same pressure as there is at sea level. Room temperature means room temperature. Room temperature and 1 atmosphere of pressure means room temperature and 1 atmosphere of pressure.