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Collision Theory Models

[ Temp/Intro | Pressure(constant V) | Pressure (constant M) | Catalyst | Surface Area | Concentration ]

These models are for experimenting with and having fun.

By clicking and holding a stationary particle you can drag the particle back to give it energy. This is recorded on screen as Energy.
Temperature is a measure of the average kinetic energy of the molecules.

The number of collisions between different coloured balls is counted (equivalent to a reaction).

To stop the animation control-click in the window.
To reset press the re-fresh button in your browser.

Vary Temperature
This model allows you to experiment by changing the Temperature in a gas

Other models:

Constant Mass & Pressure


  1. Try releasing the ball with a given energy and stopping it after a set time.
  2. Record the number of collisions.
  3. Repeat with a different amount of energy.


  1. Can you explain the difference?
  2. Can you describe how this model differs from real life?
  3. Which of the differences in Qu.2 are significant?

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