**Avogadro’s Law**:

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

“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 that

22.4 dm^{3} of any gas at STP contains 6.02 x 10^{23} molecules.

Or 24 dm^{3} of any gas at RTP contains 6.02 x 10^{23} molecules.

Or in other words

Volume of 6.02 x 10^{23} molecules of any gas at STP = 22.4 dm^{3}

Or

Volume of 6.02 x 10^{23} molecules of any gas at RTP = 24 dm^{3}

Also, Read!!

Bohr’s Atomic Model

Defects of Bohr’s atomic model

Rutherford’s Atomic model

Planck’s Quantum Theory

Gas Discharge Tube Experiment

Check out!!

-> Class 11 Chemistry Full book pdf

-> Class 12 Chemistry Full book pdf

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