Gibbs function


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Related to Gibbs function: Helmholtz function

Gibbs function

n
(General Physics) a thermodynamic property of a system equal to the difference between its enthalpy and the product of its temperature and its entropy. It is usually measured in joules. Symbol: G or F (esp US) Also called: Gibbs free energy or free enthalpy Compare Helmholtz function
[C19: named after Josiah Willard Gibbs]
References in periodicals archive ?
explains the mathematics involved, then covers the first through third laws of thermodynamics, enthalpy, heat capacity, applications of the first law to gases, equilibrium and spontaneity for systems of constant temperature, the Gibbs function and the Planck function, the thermodynamics of systems of variable composition, applications of the Gibbs function to chemical changes, the phase rule, the ideal solution, determination of nonelectrolyte activities and excess Gibbs functions from experimental data, calculation of partial molar quantities and excess molar quantities from experimental data, strong electrolytes, changes for Gibbs function for processes in solutions, systems subject to a gravitational or a centrifugal field and estimation of thermodynamic quantities.
L is the diagonal matrix which consist of the rate constants of the natural reactions 5 and 6, and P is a positively defined square matrix of elements representing second derivatives of the Gibbs function with respect to the degrees of completeness of the natural reactions 5 and 6.
Variations of the chemical potential (the partial Gibbs function of ethanol ([Delta][[Mu].
The shear-relaxation and dilatational-creep functions are described by the sum-of-exponential function, and the shift factor obeys the modified Gibbs function.