# Avogadro’s Law in simple words

Avogadro, in 1813, gave this law. It relates the volume and number of particles of ideal gases at constant temperature and pressure.

According to Avogadro’s law “equal volumes of all gases at the same temperature and pressure contain the same number of molecules.”

It means if two gases have the same volume, same temperature and same pressure then their number of molecules will also be the same. Mathematically law can be written as  :

V         ∝        n

Or

V        =      Kn

On the bases of this law, Avogadro pointed out that

22.4 dm3 of any gas at STP contains 6.02 x 1023 molecules.

Or

24 dm3 of any gas at RTP contains 6.02 x 1023 molecules.

Or in other words

The volume of 6.02 x 1023 molecules of any gas at STP = 22.4 dm3

Or

The volume of 6.02 x 1023 molecules of any gas at RTP = 24 dm3

Boyles law

Charles Law

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