Ideal Gas Law

Definition - What does Ideal Gas Law mean?

The Ideal Gas Law is the equation of state of a hypothetical ideal gas. The law is an approximation to the behavior of several gases under various conditions, even though it has many limitations. The equation for the law has four gas variables and a constant. They have been stated as PV=nRT, where:

  • n stands for amount, i.e., Moles.
  • P is the pressure of the gas.
  • T is the temperature of the gas.
  • V is volume of the gas.
  • R, the constant in the equation, is the ideal gas constant.

Petropedia explains Ideal Gas Law

In the Ideal Gas Law, three Simple Gas Laws have been combined into one: the Boyle's Law, the Charles' Law and the Avogadro's Law.

Boyle's Law: This law expresses the inverse proportional relation between the volume and pressure with fixed amount of gas at a constant temperature.

Charles' Law: This law states the directly proportional relation between the temperature and volume of a fixed amount of gas while the pressure is constant.

Avogadro's Law: This law states the directly proportional relation between the volume and amount of the gas when the pressure and temperature are constant.

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