Pressure exerted by an ideal gas molecule is given by the expression

The pressure exerted by an ideal gas molecule is given as P = MC2/3V

where M is the mass of the gas,

C is the r.m.s velocity of the gas molecules, and

V is the volume of the gas


The pressure, P, volume V, and temperature T of an ideal gas are related by a simple formula called the ideal gas law. Ideal gases are defined as having molecules of negligible size with an average molar kinetic energy depends only on temperature.

PV = nRT


  • P is the pressure of the gas,
  • V is the volume taken up by the gas
  • T is the temperature of the gas,
  • R is the gas constant, and
  • n is the number of moles of the gas.

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