#### Interactive Self-Study Module: Partial Molar Quantities

##### Overview:

This module uses screencasts and an interactive simulation to explain partial molar quantities. It then provides a step-by-step quiz simulation and an example problem to allow the user to test themselves. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, questions in screencasts, and questions to answer before using the interactive simulation, and you try to solve the example problem before watching the screencast solution. We suggest using the learning resources in the following order:

- Attempt to answer the multiple choice ConcepTest and solve the example problem before watching the screencast or working with the simulation.
- Watch the screencasts that present the definition of partial molar quantities and show how to determine them.
- Review important equations for partial molar quantities.
- Use the interactive simulation to further understand partial molar quantities.
- Use the quiz interactive simulation to test your understanding of enthalpy and entropy.
- Try to solve the example problem before watching the solution in the screencast.
- Answer the ConcepTests.
- Look at the list of key points, but only after you try to list the key points yourself.

##### Motivation:

- This module is intended for a thermodynamics course.

##### Before studying this module, you should:

- Know how to calculate a partial derivative.
- Understand vapor-liquid equilibrium for non-ideal solutions.

##### After studying this module, you should be able to:

- Explain the physical meaning of a partial molar quantity.
- Determine the partial molar quantities for a binary mixture, given a plot of the mixture property as a function of mole fraction.
- Given an analytical expression for the mixture property as a function of mole fractions, be able to calculate partial molar quantities.
- Determine the excess molar property for a binary mixture, given a plot of the mixture property as a function of mole fraction.
- Calculate a mixture property at a given composition from its partial molar quantities.