In statistical thermodynamics, the Boltzmann formula is an equation concerning the entropy S of a system derived from statistic or probability arguments:

S = k \log W \!

where k is the Boltzmann constant (Gas constant R divided by Avogadro’s number N) and W is the multiplicity or number of ways of describing the system. The Boltzmann formula, in quantitative terms, expresses the concept that entropy is a measure of disorder of a system. [1] The Boltzmann formula, in its modern form, was first given by German physicist Max Planck in 1901 as part of his principle of elementary disorder. [2]

See also
S = k ln W

1. Daintith, John. (2004). Oxford Dictionary of Science. Oxford University Press.
2. Planck, Max. (1901). "On the Law of Distribution of Energy in the Normal Spectrum". Annalen der Physik, vol. 4, p. 553 ff.

External links
Boltzmann’s entropy formula – Wikipedia.

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