Free energy, colloquially denotes energy with no or negligible feedstock cost (including solar power, telluric power, water power, and wind power), may refer to:
Science
- Thermodynamic free energy, the total amount of energy in a physical system that can be converted to do work, in particular:
- Helmholtz free energy, the amount of thermodynamic energy in a system that can be converted into work at a constant temperature and volume (called work content in chemistry)
- Gibbs free energy, the amount of thermodynamic energy in a system that can be converted into work at a constant temperature and pressure
- Free-energy relationship (or linear Gibbs energy relation) help understanding the reaction mechanism for a chemical reaction and makes it possible to predict reaction rates and equilibrium constants.
- Free energy perturbation, is a method based on statistical mechanics that is used in computational chemistry for computing free energy differences from molecular dynamics or Metropolis Monte Carlo simulations.
Conspiracy theory
- Free energy suppression, the notion that special interest groups deliberately suppress technologies that may provide energy at very little cost