Collision Theory
| Formula / Notation | Δ[A]/Δt = k[A]^m or reaction rate ∝ Z × f (collision frequency × fraction effective) |
|---|---|
| Also Known As | Collision model, Kinetic theory of reactions |
What is Collision Theory?
Collision theory explains chemical reaction rates by proposing that reactions occur only when reactant molecules collide with sufficient energy (greater than or equal to the activation energy) and with the correct geometric orientation. The rate of a reaction depends on the frequency of effective collisions. Increasing temperature increases both collision frequency and the fraction with sufficient energy.
Formula & Notation
Other Names / Synonyms: Collision model, Kinetic theory of reactions
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Collision theory explains chemical reaction rates by proposing that reactions occur only when reactant molecules collide with sufficient energy (greater than or equal to the activation energy) and with the correct geometric orientation. The rate of a reaction depends on the frequency of effective collisions. Increasing temperature increases both collision frequency and the fraction with sufficient energy.
Explains temperature dependence of reaction rates (Arrhenius equation). Rationalizes why increasing concentration or surface area accelerates reactions. Basis for designing industrial reactors and optimizing reaction conditions. Explains how enzyme active sites provide correct orientation for substr…
Collision theory explains why finely divided solids (flour, coal dust, metal powders) are explosive — massively increased collision frequency. Elevated temperatures significantly increase rate of hazardous reactions — control temperature in all exothermic processes.
The formula or notation for Collision Theory is: Δ[A]/Δt = k[A]^m or reaction rate ∝ Z × f (collision frequency × fraction effective)