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What is the difference between Helmholtz free energy and Gibbs free energy?

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Question added by Deleted user
Date Posted: 2016/02/07
awais cheema
by awais cheema , Internee ( Well Services) , Schlumberger

Gibbs free energy is the amount of work available for an isobaric or isothermal process. In other words it is the energy required to create a system out of nothing in an environment at constant pressure and temperature. Gibbs free energy is also considered to be the maximum amount of obtainable energy from a reaction.

Helmholtz free energy is the energy required to create a system out of nothing in an environment at constant temperature, where it measures the useful work of a closed system under constant temperature conditions. 

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