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Collision frequency



Main article: Collision theory

Collision frequency is defined in chemical kinetics, in the background of theoretical kinetics, as the average number of collisions between reacting molecules per unit of time. Its symbol is Z.

Unlike the preexponential factor, A, which is an empirical magnitude, Z is a theoretical magnitude, calculated ab initio. The closer A and Z are, the better a given theory of chemical kinetics is.

For a gas phase bimolecular reaction Z is

Z = N_A \sigma_{AB} \sqrt \frac{8 k_B T}{\pi \mu_{AB}}

References

  • IUPAC Goldbook definition of Collision Frequency
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Collision_frequency". A list of authors is available in Wikipedia.
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