free energy

American  

noun

Thermodynamics.

1. Gibbs function.

2. Helmholtz function.

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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

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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

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Example Sentences

But the key is the free energy you obtain by letting heat from the air outside do much of the heavy lifting in boiling the refrigerant when it is cold.

From BBC • Mar. 22, 2026

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

To overcome this challenge, experts in academia and industry have compiled the first ever reliable experimental benchmark of solid-solid free energy differences for chemically diverse, industrially relevant systems.

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

The people there also liked the idea of cooking with the sun's free energy!

From The BYU Solar Cooker/Cooler by Jones, Steven E.