## Ideal Gas Equation

### Introduction

**Boyle's Law**: The law states that volume is inversely proportional to pressure.

**Charles Law**: This law states that volume is directly proportional to temperature.

**Combined Gas Law**: On combing both the laws we get volume is directly proportional to temperature/ pressure.

**Avogadro's Law**: According to this law, the volume is directly proportional to the number of moles.

### Ideal Gas Equation

From the above 3 laws we get:

- V=k.1/P
- V=k.T
- V=k.N

**(k is a universal constant)**

By combining all the 3 laws we get the gas law or the gas equation-

**PV=NRT**

(P is pressure, V is volume, N is number of moles, R is universal constant and T is temperature)

### Postulates of Ideal Gas

There are some properties of an ideal gas given by scientist all over the world. These are:

- Gas particles behave as point masses.
- Particles posses Kinetic Energy.
- When particles strike the wall of the container, it is observed in the form of pressure.
- The collision between the particles is considered to be perfectly elastic i.e. no transfer of energy takes place.
- Interparticular space is very high so, there are no intermolecular forces of attraction.
- The overall energy of the particles remains the same.
- The kinetic energy of particles increases with increase in temperature.

**Any gas that follows the ideal gas equation is said to be an ideal gas. Any gas tends to behave as an ideal gas at a very low pressure and very high temperature.**

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