- #1
Eureka99
- 32
- 3
Hi everybody! Lately I tried to overcome some problems with understanding thermodynamics laws, and unfortunately I couldn't find anything about my question and I really hope someone can help me here...
My question is:
This version of Gibbs formula dG= VdP-SdT, can be applied to any close system, in which occur only reversible processes, if I understood well, and so I was wondering, with solid or liquid systems, what is the variation of Pressure, if there is any? I mean, with gases it might be the variation of the internal pressure of the gas, but with solids and liquids, I saw my book in a example about chemical potentials of vapor and liquid in equilibrium, that as dP of the liquid, it takes the variation of the total pressure ON the liquid. But that seems to me not legit, and only confuses me more.
I apologize for eventual inaccuracies, but I would appreciate it so much, if someone helps me making this clear!
Thank you in advance
My question is:
This version of Gibbs formula dG= VdP-SdT, can be applied to any close system, in which occur only reversible processes, if I understood well, and so I was wondering, with solid or liquid systems, what is the variation of Pressure, if there is any? I mean, with gases it might be the variation of the internal pressure of the gas, but with solids and liquids, I saw my book in a example about chemical potentials of vapor and liquid in equilibrium, that as dP of the liquid, it takes the variation of the total pressure ON the liquid. But that seems to me not legit, and only confuses me more.
I apologize for eventual inaccuracies, but I would appreciate it so much, if someone helps me making this clear!
Thank you in advance