Molar volume is the volume occupied by 1 mol of any (ideal) gas at standard temperature and pressure (STP: 1 atmospheric pressure, 0 °C). Show that it is 22.4 litres
The ideal gas equation relating pressure (P), volume (V), and absolute temperature (T) is given as: PV = nRT Where, R is the universal gas constant =8.314Jmol−1K−1 n = Number of moles = 1 T = Standard temperature = 273 K P = Standard pressure = 1 atm =1.013×105Nm−2 ∴V=nRT/P =1×8.314×273/(1.013×105) =0.0224m3 =22.4 litres Hence, the molar volume of a gas at STP is 22.4 litres.
