Interactive Self-Study Module: Immiscible Liquid Phase Diagrams
Overview:
This module uses screencasts and interactive simulations to explain the vapor-liquid phase equilibrium of two liquids that form an ideal solution. Both pressure-composition and temperature-composition diagrams are explained. It then provides step-by-step quiz simulations and example problems to allow the user to test themselves. We suggest using the learning resources in the following order:
- Attempt to answer the multiple choice ConcepTests before watching the screencasts or working with the simulations.
- Watch the screencast that describe the phase diagrams and answer the questions within the screencast.
- Use the interactive simulation to further understand the behavior of the phase diagrams.
- Work through the two quiz interactive simulations to test your understanding by preparing phase diagrams step-by-step.
- Try to solve the two example problems before watching the solution in the screencast.
- Answer the ConcepTests.
Motivation:
The phase diagrams for immiscible liquids helps understand solid-liquid phase diagrams that have multiple solid phases.
This module is intended for a Thermodynamics course and may also be useful for a Materials course.
Pre-requisites:
- Understand single-component vapor-liquid equilibrium
- Be able to apply the Antoine equation to determine saturation pressure of a single component at a given temperature
- Be able to calculate partial pressures for a mixture of ideal gases
After studying this module, you should be able to:
- Construct a pressure-composition diagram at a given temperature for two immiscible liquids, given saturation pressures at that temperature.
- Construct a temperature-composition diagram at a given pressure for two immiscible liquids, given Antoine equations
(saturation pressure versus temperature) for each component. - Determine what phases are present, given temperature, pressure, saturation pressures, and overall compositions.
- Given a vapor composition and saturation pressure data, determine the temperature (at constant pressure) or the pressure
(at constant temperature) at which one or more components condenses.