This document compares the key differences between ideal gases and real gases. Ideal gases are made of small particles with mass that have no volume and undergo perfectly elastic collisions with no attractive or repulsive forces. In contrast, real gases have small attractive and repulsive forces between particles, the particles have a small volume, and collisions result in a loss of kinetic energy rather than being perfectly elastic.

1. Ideal Gas vs Real Gas
Ideal Real
Made of small particles that SAME
have MASS
Gases are mostly empty space SAME
Low density SAME
Gas particle are in constant SAME
random straight line motion
There are NO attractive or There are VERY SMALL
repulsive forces between attractive and repulsive forces
particles between particles
Particles have NO volume Particles have a very small
volume.
Collisions are ELASTIC Collisions are inelastic (NOT
(no loss in total kinetic energy) Elastic) (When gas particles
collide they will lose energy.)