Maxwell Boltzmann speed distribution curve
The y axis of the graph shows the probablity that the speed of a molecule in a gas lies between x metres per second and and x + 1 metres per second. The curve shown corresponds to a temperature of about 80 K

Notice that:

Graph of the formula

The quicktime animation below shows the effect on the MB curve of heating from around 80 K to 500 K.

The graphs above are based on the formula shown below.



k is the value of the Boltzmann constant, m is the mass of a helium atom and n is the mass of an argon atom



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