The molar volume of a gas at standard temperature and pressure is 22.4L
Because the particles in gases are compressible, they can be driven to enclose one another when subjected to high pressure. As a result, the volume of the gas is smaller and there is less free space. The temperature has an impact on gas volume as well. A gas expands as a result of its molecules moving more quickly when it is heated. The comparison of gas volumes must be done at standard temperature and pressure due to the variation in gas volume caused by variations in pressure and temperature. The definition of standard temperature and pressure (STP) is (273.15K) and 1atm pressure. The volume of one mole of a gas at STP is its molar volume. A mole (6.02 x 10^23 typical particles) of any gas takes up 22.4L at STP.
using ideal gas law:-
PV =nRT
P = 1.00atm
n = 1.00 mol
R = 0.0821 L atm/mol K
T = 273 K
V = ?
V = nRT/P
V = (1.00 x 0.081 x 273)/1.00
V = 22.4 L
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