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Temperature analog of free energy

  1. Oct 26, 2012 #1
    The Gibbs energy is used to determine the spontaneity of a thermodynamic process under isobaric conditions.

    The Helmholtz energy is used to determine the spontaneity of a thermodynamic process under isovolumetric conditions.

    I was curious: is there an energy used to determine the spontaneity of a thermodynamic process under isothermal conditions?

    Thanks.

    BiP
     
  2. jcsd
  3. Oct 26, 2012 #2
    I suggest you look up

    'The Chemical Potential'

    Google has lots of references.
     
  4. Oct 26, 2012 #3
    Isn't the chemical potential just equal to the partial molar Gibbs energy of a multi-component system? How is that related to my question?

    BiP
     
  5. Oct 26, 2012 #4
    Well, Gibbs energy is minimal under constant pressure AND temperature, and Helmholtz under constant volume and temperature. So, there...
     
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