What is meant by liquid-gas equilibrium?

Question

What is meant by liquid-gas equilibrium?

Answer 1

Calculate the density of the liquid phase at any point on the liquid-gas equilibrium curve for nitrogen, carbon dioxide, argon, hydrogen or oxygen. ...

Answer 2

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Answer 3

the first answer is right but sounds  a little technical.  Think of it as the point where you don't have a bunch of condensation (gas to liquid) or a lot of evaporation (liquid to gas). Just remember this balance is messed up if the temperature changes.

Answer 4

Vapor-liquid equilibrium, abbreviated as VLE by some, is a condition where a liquid and its vapor (gas phase) are in equilibrium with each other, a condition or state where the rate of evaporation (liquid changing to vapor) equals the rate of condensation (vapor changing to liquid) on a molecular level such that there is no net (overall) vapor-liquid interconversion. Although in theory equilibrium takes forever to reach, such an equilibrium is practically reached in a relatively closed location if a liquid and its vapor are allowed to stand in contact with each other long enough with no interference or only gradual intereference from the outside.