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

1 Answer
anor277
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.

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