Free Energy

A thermodynamic quantity that is a function of both the internal energy and entropy of a system, at equilibrium the free energy is at a minimum.

This is the energy that is actually available to do useful work. A decrease in free energy accompanies any spontaneous process.

Free Energy Change (ΔG)

The amount of free energy released (negative ΔG) or absorbed (positive ΔG) in a reaction at constant temperature and pressure.

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Subjects: Physics