The volume occupied by a gas is directly proportional to its quantity of molecules (number of moles), considering the same conditions of temperature and pressure.
Note in the illustration above, both containers are contained with the same gas and subjected to the same temperature and pressure conditions. If we decrease the number of moles of 2 n for no, the volume also decreases: it goes from 2V for V.
With this we conclude that the relationship between volume and number of moles is constant:
V = K
no
Molar volume of gases: volume occupied by one mole of any gas, at a given pressure and temperature.
Molar volume = 22.4 L/mol
This value is the result of experiments carried out under Normal Conditions of Temperature and Pressure (CNTP) – 1 atm and 273 K.
The molar volume follows Avogadro's Hypothesis (created in 1811 by Amedeo Avogadro), where equal volumes of different gases, at the same temperature and pressure, have the same number of moles.
By Líria Alves
Graduated in Chemistry
Brazil School Team
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Gas and Aerosol Law
General chemistry - Chemistry - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/quimica/volume-molar-gases.htm