# 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:
#25^@ "C"# and#"1 bar"# , just like for the thermodynamic standard state - STP:
#0^@ "C"# and#"1 bar"# , after 1982, i.e. today...

And thus, its MOLAR volume is given by

#color(blue)(barV_(RTP)^"id") = (RT_(RTP))/P#

#= (("0.083145 L"cdot"bar/mol"cdot"K")("298.15 K"))/("1 bar")#

#=# #color(blue)("24.790 L/mol")#

or

#color(blue)(barV_(STP)^"id") = (RT_(STP))/P#

#= (("0.083145 L"cdot"bar/mol"cdot"K")("273.15 K"))/("1 bar")#

#= (273.15)/(298.15)barV_(RTP)^"id"#

#=# #color(blue)("22.711 L/mol")#