Donders inequality - direction of the transformations and equilibrium conditions

De Donder s inequality - direction of the transformations and equilibrium conditions 

In this inequality, we see the appearance of the rate of reaction (expression [1.2]), which is tantamount to writing that in order for a transformation to be possible, it is necessary for the affinity and rate to obey the condition  

This inequality constitutes de Dander s inequality, which is a general formulation of the condition of transformation and does not depend on the set of variables chosen. 

the necessary and sufficient condition of thermodynamic equilibrium is, by definition  

In light of relations [1.23] and [1.24], these conditions are also written For thermodynamic equilibrium  

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