Gas law's

What is ideal gas equation ?

The relation between pressure volume and temperature of a gas is known as ideal gas equation. Ideal gas law is also known as general gas equation. The law helps estimate the behavior of many gases under many conditions, even though it has several limitations.

The basic properties of gases are :

  1. Gases do not have a definite volume. Thus it takes the shape of the container in which it is stored.
  2.  Gases are least dense as compared to the liquids and solids.
  3. Gases expand when they are heated.
  4. When pressure is applied gases are compressed and become dense and their volume decreases.

 Now let us study the three gas law i.e. Charles law, Gay lussac's law and Boyle's law. ( Note: The temperatures used in these laws must be in degree kelvin)

1. Charle's law: 

The volume of a fixed mass of a gas is directly proportional to its absolute temperature, if the pressure is kept constant.

.Boyel's law


2.Gay lussac's law (pressure law)

The pressure of fixed mass of gas is directly proportional to its absolute temperature if the volume is kept constant.

Gay lussac's law(pressure law)

3. Boyle's law

For a fixed mass of gas at constant temperature, pressure  is inversely proportional to the volume.

Charle's law

Ideal gas equation:

By combining the above three laws we get:


Ideal gas equation

This relation is called ideal gas equation. The value of constant R is same for all gases. Therefore it is known as universal gas constant. Its numerical value is 8.31JK^-1mol^-1.

That's an overview on Ideal gas equations. If you like this post or have any suggestions do let us know in the comments we would love to hear it from you.

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