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free energy

free energy

1 6.3
Amount of energy in a system that can do work
  • noun
  • /fri ˈɛnərdʒi/
  • Specialized
translation icon : energía libre
  • For example, cell biologists need to understand entropy because free energy measures how much useful work can be done.
  • Gibbs free energy
  • free energy change
  • free energy difference

So in order for reaction to be spontaneous, the free energy of that reaction has to be negative.

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Examples

  • So in order for reaction to be spontaneous, the free energy of that reaction has to be negative.

  • The current work uses the same method and adds the elastic energy contribution to the total free energy of the system.

    Academic text (2018)
  • And we know the total differential of Gibbs free energy from weeks past.

  • Both cases have the same initial total free energy; however, the no-flux boundary exhibits faster minimization of the total free energy.

    Academic text (2018)
  • To determine the wettability and surface free energy of the thin PyC films, the contact angle was measured.

    Academic text (2018)
  • To determine the efficiency of a chemical process, scientists often calculate the free energy of the reaction.

  • In thermodynamics, the concept of free energy helps predict whether a reaction will occur spontaneously.

  • The physicist explained how free energy is a critical factor in assessing a system's ability to perform work.

Surface Forms

free energy singular
free energies plural

Morphology

free + energy

The technical meaning (a specific variational/mathematical quantity in neuroscience and ML) cannot be derived by a B1 learner from the literal constituents 'free' and 'energy' — they would likely interpret it as 'energy that is without cost' or 'liberated energy'. Because the term is discipline-specific and abstract, its intended sense is idiomatic/technical and not predictable from the parts.

Etymology

The noun free energy in physics is the part of a system's energy that is free to do 'work'. So when free energy decreases there is less energy available and the system becomes more stable, which tells scientists if a reaction will happen 'on its own'.