# Molecules Distributed between Two Compartments

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A box has two compartments connected by a hole. There are molecules in the left compartment and in the right.

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Contributed by: Enrique Zeleny (March 2011)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The entropy is .

The number of possible configurations for a particular number of particles in the left compartment is equal to the binomial coefficient .

This experiment is quoted by Stephen Wolfram as an early inspiration that led him to write *A New Kind of Science.*

References:

F. Reif, *Statistical Physics, Berkeley Physics Course*, Vol. 5, New York: McGraw-Hill, 1967.

R. M. Eisberg and L. S. Lerner, *Physics: Foundations and Applications*, Vol.
2, New York: McGraw-Hill, 1981.

See Statistical Mechanics and Microstate on Wikipedia for more information.

## Permanent Citation