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фаз правило Portuguese
regra das fases de gibbs Spanish
grados de libertad Catalan
graus de llibertat General principle in thermodynamics regarding pVT systems in equilibrium.
1
The question, moreover, has had a new light thrown upon it by the application of the principles of thermodynamics and of the phase rule.
2
The Phase Rule of Willard Gibbs, especially as developed by Bakhuis Roozeboom, is a most useful guide in such investigations.