FREE ENERGY

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'Free energy' may refer to:

Contents

Physics

Economics

Engineering

Physics

★ Thermodynamic free energy, the total amount of energy in a physical system which can be converted to do work, in particular:

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★ Helmholtz free energy, the amount of thermodynamic energy in a system which can be converted into work at constant temperature (called work content in chemistry).

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★ Gibbs free energy, the amount of thermodynamic energy in a system which can be converted into work at a constant temperature ''and'' pressure.

★ A source of energy which would violate the Second law of thermodynamics

Economics

★ Energy with no or negligible feedstock cost, including solar power, telluric power, water power, and wind power

★ Free energy suppression, the notion that corporate energy interests deliberately suppress technologies that may provide energy at very little cost.

Engineering

★ Most renewable energy sources

★ Electromagnetic free energy, a.k.a. radiant energy