What is the volume of 6.23 moles of carbon dioxide at STP?

1 Answer
Apr 12, 2017

Of course this depends on how your syllabus defines STP. We might be given the molar volume at "STP".

Explanation:

The current definition prescribes a temperature of 273.15*K, and a pressure of 1*"bar", 100*kPa.

And we then use the Ideal Gas Equation to get our "volume" .

V=(nRT)/P=(6.23*cancel(mol)xx8.314xx10^-2cancel((L*"bar")/(K^-1*mol^-1))xx273.15*cancelK)/(1*cancel"bar") =141*L

Note that I chose the R constant appropriately.

Alternatively, sometimes the supplementary material in an exam gives the "molar volume at STP", whatever standard they have used.