Collision Theory Rate Expression (k = P Z e^{-Ea/(RT)})

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k = P Z e^{-Ea/(RT)}

What each symbol means

SymbolWhat it stands for
PSteric/orientation probability factor (0–1)
ZCollision frequency factor (depends on T, σ, μ)
E_aActivation energy
R, TGas constant, kelvin temperature

When to use this

Qualitative: successful collisions ∝ collisions × Boltzmann factor. Z ∝ √T for bimolecular hard-sphere model.