The term '''free energy''' is clearly defined in scientific physics and is used as Helmholtz free energy or Helmholtz potential. In physics it is a measurement for the useful work obtainable from a thermodynamic system, the amount of energy, that can be utilized according to the second law of thermodynamics [http://en.wikipedia.org/wiki/Helmholtz_free_energy Helmholtz free energy].
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The term '''free energy''' is clearly defined in scientific physics and is used as Helmholtz free energy or Helmholtz potential. In physics it is a measurement for the useful work obtainable from a thermodynamic system, the amount of energy that can be utilized according to the second law of thermodynamics [http://en.wikipedia.org/wiki/Helmholtz_free_energy Helmholtz free energy].