free energy change — The total energy change in a system that is available to do useful work as the system goes from its initial state to its final state at constant temperature and pressure … Dictionary of microbiology
standard free energy change — The free energy change of a reaction at 1 atmosphere pressure when all reactants and products are present in their standard states; usually the temperature is 25°C … Dictionary of microbiology
free energy — Gibbs free energy (G) the thermodynamic function G = H − TS, where H is enthalpy, T absolute temperature, and S entropy. For chemical reactions occurring at a constant temperature and pressure, the free energy change ΔG =… … Medical dictionary
free energy — Thermodynamics. 1. See Gibbs function. 2. See Helmholtz function. * * * Measure of the total combined energies within a system, derived from heats of transformation, disorder, and other forms of internal energy (e.g., electrostatic charges). A… … Universalium
Gibbs free energy — Thermodynamics … Wikipedia
Helmholtz free energy — In thermodynamics, the Helmholtz free energy is a thermodynamic potential which measures the “useful” work obtainable from a closed thermodynamic system at a constant temperature and volume. For such a system, the negative of the difference in… … Wikipedia
Thermodynamic free energy — In thermodynamics, the term thermodynamic free energy refers to the amount of work that can be extracted from a system, and is helpful in engineering applications. It is a subtraction of the entropy of a system ( useless energy ) from the total… … Wikipedia
Helmhotz free energy — (A or F in US) Similar to Gibbs free energy but with internal energy substituted for enthalpy. A negative change in A is indicative of a spontaneous change in a closed system at constant volume … Dictionary of automotive terms
Energy storage — is the storing of some form of energy that can be drawn upon at a later time to perform some useful operation. A device that stores energy is sometimes called an accumulator. All forms of energy are either potential energy (eg. chemical,… … Wikipedia
Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) … Wikipedia
