General form of the displacement laws

As the system is initially at equilibrium, the affinity of the transformation is null. As this affinity is a state 

Chemical Equilibria, First Edition. Michel Soustelle. 

If we apply de Bonder s inequality to the new state of rate 91, we obtain  

This relation gives us the general form of the system s evolution after the disturbance. In terms of chemical potentials, this inequality becomes  

In terms of the variables pressure, temperature, and compositions, the affinity is expressed by relation [1.39]. If we apply a disturbance to the system at equilibrium by varying only the temperature - i.e. if the pressure and extent of the reaction remain constant - the new value of the affinity becomes  

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