Gibbs–Duhem equation

About: Gibbs–Duhem equation is a research topic. Over the lifetime, 393 publications have been published within this topic receiving 6248 citations. The topic is also known as: Gibbs-Duhem equation.

On the application of the Gibbs-Duhem equation for calculation of the free energy of mixing of polymer solutions

Abstract: Various methods for calculating the free energy of mixing using the Gibbs-Duhem equation were compared. A new method for treating the experimental data on concentration dependences for chemical potential was advanced. As compared with other known calculating procedures, this method was shown to provide more accurate estimates of the free energy of mixing

Time-Averages and the Heat Theorem

Abstract: In this paper it is illustrated how to compute the time–average of a generic dynamical variable in the limit of large systems. It is also shown how to use this result to deduce an analogue of the second principle of thermodynamics, even in presence of metastable phenomena, for which it is not granted that the standard Gibbs measure can be used.

On determining absolute entropy without quantum theory or the third law of thermodynamics

Abstract: We employ classical thermodynamics to gain information about absolute entropy, without recourse to statistical methods, quantum mechanics or the third law of thermodynamics. The Gibbs-Duhem equation yields various simple methods to determine the absolute entropy of a fluid. We also study the entropy of an ideal gas and the ionization of a plasma in thermal equilibrium. A single measurement of the degree of ionization can be used to determine an unknown constant in the entropy equation, and thus determine the absolute entropy of a gas. It follows from all these examples that the value of entropy at absolute zero temperature does not need to be assigned by postulate, but can be deduced empirically.