Vapor - Liquid Equilibrium Equation (VLE)

  • #1
92
10
Most fundamental equation for VLE is $$ \mu_i^L = \mu_i^V $$
It states that for every component chemical potential must be equal in both liquid and vapor phase at equilibrium. However, in my thermo textbook, this equation is derived for isolated systems while usually when dealing with VLE, systems are closed since heat is usually exchanged with surroundings like in distillation for example. Does this equation hold also for closed systems and if so how can it be derived?
 

Answers and Replies

  • #2
21,493
4,875
This equation holds for vapor mixtures and corresponding liquid mixtures at thermodynamic equilibrium with one another. The derivation of this fact is presented in Chapter 10 of Introduction to Chemical Engineering Thermodynamics, Smith and Van Ness.
 
  • Like
Likes Astronuc and Dario56
  • #3
It apply in open and closed systems

Horacio
 

Related Threads on Vapor - Liquid Equilibrium Equation (VLE)

Replies
1
Views
2K
Replies
1
Views
19K
Replies
10
Views
4K
Replies
2
Views
982
U
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
9
Views
1K
  • Last Post
Replies
1
Views
3K
Top