Variance of a system. Gibbs' law. Vapor pressure
General principles - the theory of refrigerating machines
Article REF: BE9730 V1
Variance of a system. Gibbs' law. Vapor pressure
General principles - the theory of refrigerating machines

Authors : Maxime DUMINIL, Jean-Pierre DOMBLIDES

Publication date: January 10, 2012 | Lire en français

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7. Variance of a system. Gibbs' law. Vapor pressure

Gibbs' law tells us that the variancevof the refrigerant system is :

v=c+2φ( 19 )

with :

c
 : 
number of components,
j
 : 
number of separate phases,
v
 : 
variance or number of degrees of freedom.

7.1 Single-phase system

...
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