Gibbs free energy
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In thermodynamics, the Gibbs free energy (IUPAC recommended name: Gibbs energy or Gibbs function; also known as free enthalpy to distinguish it from Helmholtz free energy) is a thermodynamic potential that measures the "useful" or process-initiating work obtainable from a thermodynamic system at a constant temperature and pressure (isothermal, isobaric). Just as in mechanics, where potential energy is defined as capacity to do work, similarly different potentials have different meanings. The Gibbs free energy is the maximum amount of non-expansion work that can be extracted from a closed system; this maximum can be attained only in a completely reversible process. When a system changes from a well-defined initial state to a well-defined final state, the Gibbs free energy ΔG equals the work exchanged by the system with its surroundings, minus the work of the pressure forces, during a reversible transformation of the system from the same initial state to the same final state.
- See also: Wikipedia
- Related: Calphad, Electron equivalent, Enthalpy-entropy compensation, Free entropy, Grand potential, Thermodynamic free energy
| IUPAC definition (Gibbs energy) IUPAC definition (Gibbs energy) www.iupac.org/goldbook/G02629.pdf - Web |
| Gibbs energy Gibbs energy wine1.sb.fsu.edu/chm1046/notes/Thermody/Gibbs/Gibbs.htm - Web |
| Gibbs Free Energy Gibbs Free Energy scienceworld.wolfram.com/physics/GibbsFreeEnergy.html - Web |
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| Gibbs Free Energy Gibbs Free Energy hyperphysics.phy-astr.gsu.edu/hbase/thermo/helmholtz.html#c2 - Web |
| Gibbs Free Energy Java Applet Gibbs Free Energy Java Applet mc2.cchem.berkeley.edu/Java/Gibbs/Gibbs.html - Web |
| Gibbs Free Energy Gibbs Free Energy xenon.che.ilstu.edu/.../gibbs.html#driving - Web |
| Using Gibbs Free Energy for prediction of chemical... Using Gibbs Free Energy for prediction of chemical driven material ageing www.composite-agency.com/product.htm - Web |
