What is Avogadro's Law?, Applications, Important Points, JEE 2025
Shrivastav 6 Jun, 2024
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Avogadro's Law : Chemistry is filled with fascinating laws and principles that govern the behaviour of matter. One such fundamental principle is Avogadro's Law, which provides insights into the relationship between the volume of a gas and the number of gas particles. Let's embark on a journey to unravel Avogadro's Law in simple terms and explore its significance for students studying chemistry.
What is Avogadro's Law?
Avogadro's Law, named after the Italian scientist Amedeo Avogadro, states that equal volumes of gases, at the same temperature and pressure, contain the same number of molecules. In simpler terms, it means that the volume of a gas is directly proportional to the number of gas particles present, as long as the temperature and pressure remain constant.
Important Points To Understand Avogadro's Law
To understand Avogadro's Law better, let's break it down into simpler terms. Imagine you have two containers, one filled with helium gas and the other with oxygen gas, both at the same temperature and pressure. According to Avogadro's Law, if the volumes of these two gases are equal, they will contain the same number of molecules, despite being different gases.
Example Of Avogadro's Law
Ex. 1 1 2 ←Stoichiometry
H 2(g) Cl 2(g) 2HCl (g)
1 Volume 1 Volume 2 Volume
N molecules N molecules 2N molecules
It is correct as molecule is divisible.
The deflation of automobile tyres: When the air trapped inside the tyre escapes, the number of moles of air present in the tyre decreases. This results in a decrease in the volume occupied by the gas, causing the tyre to lose its shape and deflate.
Avogadro's Law FAQs
Q.1 : What is Avogadro's Law?
Q.2 : How does Avogadro's Law apply to real-life situations?
Q.3 : Why is Avogadro's Law important in chemistry?
Q.4 : How is Avogadro's Law used in stoichiometry?
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