Beyond Ideal
An interactive journey from the ideal gas law to the messy reality of real gases
Ideal Gas
Tiny particles bouncing in a box, perfectly simple
Real Gas
Particles that attract, repel, and take up space
You might remember PV = nRT from chemistry class. But what does it actually mean? And why doesn't it always work?
This site uses real-time particle simulations to build your intuition, from the ground up. The simulations above are interactive, try clicking and dragging!
Note: You might see a sharp spike in pressure or velocity when a simulation first loads. This is a quirk of the initialization; give the system a few seconds to settle into its stable state.
Getting Started
Learn to interact with the simulations
What is a Gas?
The microscopic picture of gas particles
The Ideal Gas Law
Discover PV = nRT through simulation
Kinetic Theory
Why temperature is just particle motion
When Ideal Breaks Down
Real particles have size and attract each other
Van der Waals Equation
Correcting the ideal gas law for reality
Free Exploration
All the controls, no restrictions