Flux

:This article is about the concept of flux in science and mathematics. For other uses of the word, see flux (disambiguation).

Flux in chemistry

Diffusion

Flux, or diffusion, for gaseous molecules can be related to the function:

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:Phi = 4pisigma_{ab}^2sqrt{rac{8kT}{pi N}}

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where N is the total number of gaseous particles, k is Boltzmann's constant, T is the relative temperature in kelvins, and sigma_{ab} is the mean free path between the molecules a and b.

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Thermal systems

In thermal systems, the flux is the rate of heat flow.

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