Question

Why do real gases deviate from the ideal gas laws at low temperatures?

Answer 1

As the molecules of gas interact, they are attracted to each other, following ideal laws, but they also collide with one another, and this makes them deviate from them. High pressures and low temperatures can also cause them to deviate, this is because the more pressure there is or the lower temperature there is, the closer together the molecules are, and the more they collide.

Hope this answered your question!

Answer 2

The answer is: The volume of a real gas is larger than expected from the ideal gas equation at low temperatures.

An ideal gas is:  

1) made up of molecules which are in constant random motion in straight lines.  

2) all collisions are perfectly elastic, there is no loss of kinetic energy during the collision.  

3) follows ideal gas law: p·V = n·R·T.  

4) the gas particles have negligible volume.  

At low temperatures, volume of the gas is not negligible.