Is a system always at equilibrium during phase changes?

[reconrusty]

I am in the section of Gibbs Energy for my chemistry course and in the textbook it says the system is at equilibrium at the boiling point, so deltaG=0, and deltaH=TdeltaS. I was just wondering if the system is always at equilibrium during any phase change, not just at its boiling point.

Thanks!

 

[Bystander]

equilibrium during any phase change

The free energies of the phases are equal at the phase boundaries in the phase diagram, so what do you think?

 

[reconrusty]

I should say yes.

 

[Bystander]

Fair 'nuff.