free energy

American  

noun

Thermodynamics.

1. Gibbs function.

2. Helmholtz function.

---

free energy British  

noun

1. a thermodynamic property that expresses the capacity of a system to perform work under certain conditions See Gibbs function Helmholtz function

---

free energy Scientific  

1. A thermodynamic quantity that is the difference between the internal energy of a system and the product of its absolute temperature and entropy. Free energy is a measure of the capacity of the system to do work. If its value is negative, the system will have a tendency to do work spontaneously, as in an exothermic chemical reaction. Free energy is measured in kilojoules per mole.

2. Also called Gibbs free energy

---

Example Sentences

The charity, which offers offer free energy advice, debt support, and grants, is expecting to see up to 50% more people using the service than last year because energy debt is piling up.

From BBC • Oct. 14, 2025

And imagine if you were charging your car with energy from your own solar panels - you could sell this free energy to the grid for a decent margin, trials have shown.

From BBC • Dec. 7, 2023

Quantitatively measuring the free energy differences between crystalline forms is no small challenge.

From Science Daily • Nov. 10, 2023

The lack of reliable experimental benchmark data has been a major bottleneck in developing computational methods for accurately predicting solid-solid free energy differences.

From Science Daily • Nov. 10, 2023

No wonder they hung around Durval's machines sucking up what free energy they could.

From Feline Red by Sampson, Robert