Partially-Miscible Liquids Phase Diagram: Screencasts

Demonstrates vapor-liquid equilibrium (VLE) for a binary system as the positive deviations from Raoult’s law increases until phase separation occurs and two liquid phases are in equilibrium.

We suggest you list the important points in this screencast as a way to increase retention.

Describes phase behavior for a binary system in which two liquids are only partially miscible. The temperature-composition phase diagram is used to explain the phase behavior.

We suggest you list the important points in this screencast as a way to increase retention.

Important Equations:

Gibbs Phase Rule for non-reactive system:     F = 2 + C – P
where F is the number of degrees of freedom
C is the number of components
P is the number of phases

Fugacity of two liquids in equilibrium: \[x_{i}^{\alpha}\gamma_{i}^{\alpha}P_{i}^{sat}\,=\,x_{i}^{\beta}\gamma_{i}^{\beta}P_{i}^{sat}\]

where \(\gamma_{i}^{\alpha}\) and \(\gamma_{i}^{\beta}\) are the activity coeffecients of component \(i\) in the \(\alpha\) and \(\beta\) phase respectively, and \(x_i^{\alpha}\) and \(x_i^{\beta}\) are the mole fractions in the alpha and beta phases.