What is vapor-liquid phase equilibrium?

In thermodynamics and chemical engineering, the vapor–liquid equilibrium (VLE) describes the distribution of a chemical species between the vapor phase and a liquid phase.

What is vapor-liquid equilibrium used for?

Vapor-liquid equilibrium data is useful for determining how liquid mixtures will separate. Because the liquids have different boiling points, one liquid will boil into a vapor and rise in the column, while the other will stay as a liquid and drain through the unit.

How do you find vapor-liquid equilibrium data?

simply add material and in the utility menu select a material stream and then binary phase envelope you can get VLE and also LLE data.

How does pressure affect vapor-liquid equilibrium?

The pressure exerted by a vapor in dynamic equilibrium with a liquid is the equilibrium vapor pressure of the liquid. If a liquid is in an open container, however, most of the molecules that escape into the vapor phase will not collide with the surface of the liquid and return to the liquid phase.

What is liquid liquid equilibrium?

When two different pure liquids are unable to mix in all proportions, they are said to be partially miscible. When these liquids are placed in contact with one another and allowed to come to thermal, mechanical, and transfer equilibrium, the result is two coexisting liquid mixtures of different compositions.

What is equilibrium vaporization ratio?

[‚ē·kwə′lib·rē·əm ‚vā·pə·rə′zā·shən ‚rā·shō] (physical chemistry) In a liquid-vapor equilibrium mixture, the ratio of the mole fraction of a component in the vapor phase (y) to the mole fraction of the same component in the liquid phase (x), or y/x = K (the K factor).

When a liquid is in equilibrium with its vapor in a closed container?

When a liquid is in equilibrium with its vapor in a closed container: a. the amount of gas in the container must exactly equal the amount of liquid.

What is equilibrium ratio?

The ratio of the concentrations of the reactants and products is known as the equilibrium constant expression.