##  [Gibbs Phase Rule](/index.php/gibbs-phase-rule) 

  ##  [Gibbs Phase Rule](https://natural.quantumdictionary.io/gibbs-phase-rule-0) 

  

 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/index.php/topic-specific-dictionaries/natural-formal-sciences)



**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A thermodynamic counting rule that gives the number F of independent intensive degrees of freedom (variables such as temperature, pressure, composition) for a system at equilibrium as F = C − P + 2, where C is the number of chemically independent components and P the number of phases present; the +2 corresponds to temperature and pressure and is reduced by one for condensed systems where pressure 

 

 

 

 

 





 

 



 ##  [Gibbs Phase Rule](https://engineering.quantumdictionary.io/gibbs-phase-rule-1) 

  

 [![Engineering & Applied Technologies Dictionary](/sites/default/files/styles/large/public/2026-01/Engineering%20%26%20Applied%20Technologies.png.webp?itok=_IKO7_-n)](/index.php/topic-specific-dictionaries/engineering-applied-technologies)



**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A thermodynamic counting relation that gives the number of independent intensive degrees of freedom F for a macroscopically homogeneous, multicomponent, multiphase system at equilibrium: F = C − P + 2, where C is the number of chemically independent components and P the number of coexisting phases (for non‑reactive systems in absence of external fields).

 

 

 

 

 





 

 



 ##  [Gibbs Phase Rule](https://health.quantumdictionary.io/gibbs-phase-rule-2) 

  

 [![Health & Life Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Health%20%26%20Life%20Sciences.png.webp?itok=yyyaiQOY)](/index.php/topic-specific-dictionaries/health-life-sciences)



**Health & Life Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A counting relation that gives the number of independent intensive variables (degrees of freedom F) that can be varied in a heterogeneous system at thermodynamic equilibrium: F = C − P + 2 for a non-reacting system, where C is the number of independent components and P the number of coexisting phases; the formula is modified when chemical reactions or external constraints are present.

 

 

 

 

 





 

 



 ##  [Gibbs Phase Rule](https://commerce.quantumdictionary.io/gibbs-phase-rule-3) 

  

 [![Commerce, Trade & Industry Dictionary](/sites/default/files/styles/large/public/2026-01/Commerce%2C%20Trade%20%26%20Industry.png.webp?itok=nh8jKPLm)](/index.php/topic-specific-dictionaries/commerce-trade-industry)



**Commerce, Trade & Industry Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A thermodynamic counting relation for a closed, equilibrated, non‑reactive system that gives the number of independent intensive degrees of freedom F as a function of the number of components C and coexisting phases P: F = C − P + 2.