# What is the Ideal Gas Law? | Definition, Formula, Units – Kinetic Theory of Gases

Ideal or Perfect Gas Equation:
Perfect gas also called an ideal gas. Gases which obey all gas laws in all conditions of pressure and temperature are called perfect gases.

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## What is the Ideal Gas Law? | Definition, Formula, Units – Kinetic Theory of Gases

In most usual conditions (for instance at standard temperature and pressure), most real gases behave qualitatively like an ideal gas. Many gases such as nitrogen, oxygen, hydrogen, noble gases.

Ideal Gas Law Formula:
Ideal Gas Law or Equation of perfect gas

PV = nRT

where,
P = pressure,
V = volume,
T = absolute temperature,
R = universal gas constant and
n = number of moles of a gas.
Universal gas constant, R = 8.31 J mol-1K-1.

Ideal Gas Equation Units:
In SI units, p is measured in pa or N/m²
V is measured in cubic metres, (m³)
n is measured in moles, and
T in kelvins

Kinetic Theory of Gases:
In this concept, it is assumed that the molecules of gas are very minute with respect to their distances from each other. The molecules in gases are in constant, random motion and frequently collide with each other and with the walls of any container.

In this portion, you will learn about the properties of gases, based on density, pressure, temperature and energy. Continue reading here to learn more.