Chemical Engineering Thermodynamics

In any spontaneous process, the __________ free energy decreases.

  • A. Helmholtz
  • B. Gibbs
  • C. Both A & B
  • D. Neither A nor B
Answer: Option C.

For any spontaneous process dG⩽0  , dA⩽0

And usually spontaneous process takes place when there are finite differences so, the process will be usually irreversible.
Hence dG<0 & dH<0

So, free energy goes on decreasing and when the finite difference becomes infinitesimal difference it becomes constant.

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