##  [Eyring Equation](/eyring-equation) 

  ##  [Eyring Equation](https://engineering.quantumdictionary.io/eyring-equation-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A transition‑state theory expression relating a reaction's rate constant k to temperature and the Gibbs free energy of activation ΔG‡: k = κ (k_B T / h) · exp(−ΔG‡/(R T)), where k_B is Boltzmann's constant, h is Planck's constant, κ is the transmission coefficient (often ≈1 under the theory's assumptions), and ΔG‡ = ΔH‡ − TΔS‡ is the free energy barrier.