# Free Energy Definition in Science

In the Science. There are many definitions of “free energy”.

### Thermodynamic Free Energy

In physics and bodily chemistry, free energy refers to the quantity of interior power of a thermodynamic system that is reachable to operate work. There are extraordinary types of thermodynamic free energy:

Gibbs free electricity is the electricity that might also be converted into work in a device that is at consistent temperature and pressure. Equity for gibs free energy is: G = H-TS

Where G-Gibbs have free energy, H is enthalpy, T-temperature, and S-entropy. Helmholtz free power is energy that may additionally be transformed into work at regular temperature and volume. Here is equality for helmets free energy: A = U-TS

where A is the Helmholtz free energy, U is the inside electricity of the system, T is the absolute temperature (Kelvin) and S is the entropy of the system.

Landau free energy describes electricity of an open system in which particles and power may also be exchanged with the surroundings. The equation for Landau free power is: Ω = A – μN = U-TS – μN

where N is the variety of particles and μ is chemical potential.

### Variational Free Energy

In information theory, variational free strength is a construct used in variational Bayesian methods. Such techniques are used to approximate intractable integrals for information and desktop learning.

### Other Definitions

In environmental science and economics, the phrase “free energy” is from time to time used to refer to renewable sources or any power that does not require economic payment.

Free energy may additionally refer to the strength that powers a hypothetical perpetual motion machine. Such a gadget violates the laws of thermodynamics, so this definition in modern times refers to a pseudoscience as a substitute than tough science.