##  [Activity Coefficient](/activity-coefficient) 

  ##  [Activity Coefficient](https://engineering.quantumdictionary.io/activity-coefficient-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A dimensionless factor γ that quantifies the deviation of a species' chemical potential in a mixture from ideal solution behaviour by relating the species' activity a to its concentration measure (e.g., a = γ·x for mole fraction standard states); γ = 1 indicates ideal behaviour under the chosen standard state.