Free energy may refer to:
In science:
- Thermodynamic free energy, the energy in a physical system that can be converted to do work, in particular:
- Helmholtz free energy, the energy that can be converted into work at a constant temperature and volume
- Work content, a related concept used in chemistry
- Gibbs free energy, the energy that can be converted into work at a uniform temperature and pressure throughout a system
- Variational free energy, a construct from Information theory that is used in Variational Bayesian methods
In pseudoscience:
- Free energy device, a hypothetical device that creates energy in a hypothetical isolated system, i.e. without any external input, thereby contradicting the laws of thermodynamics
- Free energy suppression, a conspiracy theory that advanced energy technologies are being suppressed by special interest groups
In music
- Free Energy (band), a 5-piece rock band on DFA Records
Famous quotes containing the words free and/or energy:
“I believe that the members of my family must be as free from suspicion as from actual crime.”
—Julius Caesar [Gaius Julius Caesar] (100–44 B.C.)
“The principle of avoiding the unnecessary expenditure of energy has enabled the species to survive in a world full of stimuli; but it prevents the survival of the aristocracy.”
—Rebecca West (1892–1983)