1.Ideal gas has no definite volume while real gas has definite volume.
2.Ideal gas has no mass whereas real gas has mass.
3.Collision of ideal gas particles is elastic while non-elastic for real gas.
4.No energy involved during collision of particles in ideal gas. Collision of particles in real gas has attracting energy.
5.Pressure is high in ideal gas compared to real gas.
6.Ideal gas follows the equation PV=nRT. Real gas follows the equation (P + a/V2) (V – b) = nRT.