This document discusses three gas laws: Boyle's law, Charles's law, and Avogadro's law. Boyle's law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. Charles's law describes how gases expand when heated, with temperature and volume being directly related at constant pressure. Avogadro's law establishes that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.

1. Prepared by
Muneer K M
Physical Science

3. TOPIC
 GAS LAWS

4. Characteristics of gas molecule
 Atoms are loosely packed
 Atoms have high moving capacities
 There is low force of attraction between two atoms
 There is great space between two atoms

5. Gas Laws
 Boyle’s law
 Charles's law
 Avogadro law

6. Boyle’s law
 The law state that “At constant temperature,
pressure and volume are inversely proportional”
 Or Boyle's law is a gas law, stating that the pressure
and volume of a gas have an inverse relationship, when
temperature is held constant.

7. Mathematical expression of boyle’s law

8. Graphical representation of boyle’s law

9. Charles's Law
 Charles's law (also known as the law of volumes) is
an experimental gas law which describes how gases
tend to expand when heated.
 A modern statement of Charles's law is. When the
pressure on a sample of a dry gas is held constant, the
Kelvin temperature and the volume will be directly
related.

10. Mathematical expression of Charles's law

11. Graphical representation of Charles's law

12. Avogadro’s law
 Avogadro's law states that, "equal volumes of all
gases, at the same temperature and pressure, have the
same number of molecules". For a given mass of an
ideal gas, the volume and amount (moles) of the gas
are directly proportional if the temperature and
pressure are constant.

13. Mathematical expression

14. Graphical Representation

15. Conclusion
 Gas is the third form of the matter, oxygen is a gas ,
which is the fundamental gas of human beings and
animals.