[[Vapor-Liquid Equilibrium of Mixtures]] > ![[flash_separators4-1.jpg|grid]]![[flash_separators1.jpg|grid]] > Schematic for a steam separator from [Penn Separator](http://www.pennseparator.com/flash_separators.htm) In this process, the liquid and vapor parts of a mixture are separated. The liquid mole fraction $x_1$ is now the overall mole fraction $z_1$ of the new mixture. The process can be repeated to further separate the components. ## Relevant Properties Gibbs energy - **[[Phases in equilibrium always have the same chemical potential]]**. [[Fugacity of a component in a mixture]]