The simulation below depicts random elastic collisions of
units in a container.
The simulation graphically presents a profile of the distribution
of energy among these units during the process where a large
number of collisions occur.
The following items are selectable:
A target and projectile are selected at random and the energy
lost by the projectile to the target is also selected at random.
This process continues for the selected number of collisions,
which can be over 100,000.
- their initial energy (for example 30 - 500), minimum=1
- the number of units (typical values are 100-10,000),
- the number of collisions (to reach equilibrium generally
requires > 2.5 times the number of units), minimum=200
The initial energy distribution is one in which all the units
have the same energy. By varying the number of collisions it is
possible by monitoring Ln W to see how many are required before
an "equilibrium" distribution results. This appears as a
The values in the textbox show the population of the energy
levels and the value of Ln W taken at 100 intervals throughout
the simulation. Use the right mouse button to click in the
textbox to copy the information to the clipboard for use in a
Spreadsheet (via Ctr-C and Ctr-V copy and paste).
R. M. Hanson (firstname.lastname@example.org),
Debbie-Ann Facey, R.J. Lancashire (email@example.com)
and W.R. Pinnock (firstname.lastname@example.org) Department of Chemistry,
C. Muir, (email@example.com) FST, UWI, Mona Campus, Kgn 7, JAMAICA,
Return to Chemistry, UWI-Mona, Home Page
Created and maintained by Prof. Robert J.
The Department of Chemistry, University of the West Indies,
Mona Campus, Kingston 7, Jamaica.
Created April 1995. Links checked and/or
last modified 10th November 2015.