Question -
Answer -
The ideal gas equation relating pressure (P), volume (V), andabsolute temperature (T) is given as:
PV = nRT
Where, R is the universal gas constant = 8.314 J mol-1K-1
n = Number of moles = 1
T = Standard temperature = 273 K
P = Standard pressure = 1 atm = 1.013 x 105Nm-2
Hence,
V = nRT / P
= 1 x 8.314 x 273 / 1.013 x 105
= 0.0224 m3
= 22.4 litres
Therefore, the molar volume of a gas at STP is 22.4 litres