Resumen de Applications of the Gibbs Function to Chemical Systems and Subsystems
The Gibbs Function, G, cannot even be defined except for a system such that the temperature, T, and pressure, P, are uniform. Any systems for which G is calculated must consist only of regions of fluid, or else any regions of solid must be totally isotropic. For any change of state, T and P must also be the same for both the initial and final states. Therefore, it is not possible to calculate Delta G for the change of state in the Bates-Tykodi System which includes a container which is a strained solid. Willard Gibbs himself recognized this constraint of uniform pressure when he first presented the function which now bears his name, but many subsequent textbooks have overlooked it.
