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Which one of the following parameters is significant to ascertain chemical equilibrium of a system?

Which one of the following parameters is significant to ascertain chemical equilibrium of a system? Correct Answer Gibb's function

Concept:

Gibbs statement concerning equilibrium

Gibbs based his entire treatment of heterogeneous equilibrium on the following statements.

The criteria of equilibrium of a material system which is isolated from all external influences may be expressed in either of the following entirely equivalent forms.

  1. For equilibrium of any isolated system, it is necessary and sufficient that in all possible variations of the state of the system which do not alter its energy, the variations of its entropy shall either vanish or be negative.
    • (δS)E ≤ 0 
  2. For equilibrium of any isolated system it is necessary and sufficient that in all possible variations of the state of the system which do not alter its entropy,  the variations of its energy shall either vanish or be positive.
  • (δS)E ≥ 0

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