What is the volume of a gas at RTP and STP?

1 Answer
Jul 9, 2017

Well, you'll have to give your equation of state if you want my answer to be more accurate... But since you did not mention ideality, I will have to assume an ideal gas...


We also utilize the latest RTP and STP from IUPAC:

  • RTP: 25C and 1 bar, just like for the thermodynamic standard state
  • STP: 0C and 1 bar, after 1982, i.e. today...

And thus, its MOLAR volume is given by

¯¯¯VidRTP=RTRTPP

=(0.083145 Lbar/molK)(298.15 K)1 bar

= 24.790 L/mol

or

¯¯¯VidSTP=RTSTPP

=(0.083145 Lbar/molK)(273.15 K)1 bar

=273.15298.15¯¯¯VidRTP

= 22.711 L/mol