How would you determine the volume that 1 mol of a gas at 0°C and 1 atm occupies?

1 Answer
anor277
Nov 22, 2015

By means of the Ideal gas law.

Explanation:

#PV = nRT#; where #P# is pressure; #V# is volume; #R# is the appropriate gas constant (usefully #R# #=# #0.0821# #L*atm*K^(-1)*mol^(-1)#), and #T# is the absolute temperature in Kelvin, #K#.

You will always be given these constants, but you must manipulate them so that you get an answer with the appropriate units.

If #V# #=# #(nRT)/P#, then #V# #=# #(1*molxx0.0821*L*atm*K^(-1)*mol^(-1)xx273K)/(1*atm)# will give me an answer in litres.

Alternatively, it is a given that 1 mole of ideal gas will occupy a volume of #22.4# #dm^3# at #273# #K#. And #1# #dm^3# #=# #{1xx10^(-1)m}^3# #=# #1xx10^(-3)*m^3# #=# #1# #L# (a litre is a 1000th of a cubic metre).

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