Free Energy

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