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|07.06 Solving The Cubic EOS for Z||Click here.||83.33329999999999||6||
3. Using Preos.xlsx and Interpreting Output (11:38) (msu.edu)
1. Is it possible to have a 1-root region below the critical temperature?
2. Is it possible to have a 3-root region above the critical temperature?
3. How does fugacity help us to identify the proper root to select?
4. Would argon at 5 MPa be in the 1-root or 3-root region?
|13.05 - UNIFAC||Click here.||80||5||
Unifac.xls Calculation of Bubble Temperature. (3 min) (LearnChemE.com)
|07.05 Cubic Equations of State||Click here.||80||1||
Intro to the vdW EOS. (LearnCheme.com, 5min) Provides a brief overview of the van der Waals (vdW) 1873 equation of state (EOS), which served as a prototype for EOS development for over 100 years. Note: the vdW EOS is just one conjecture of how equations of state for real fluids may be formulated. In reality, each fluid has its own unique EOS. The vdW model conjectures that the pressure is altered relative to the ideal gas by the presence of attractive forces and repulsive forces.
1. Of the two parameters a and b, which is related to attractive forces and which is related to attractive forces?
|18.09 - Sillen Diagram Solution Method||Click here.||80||1||
Sillen Diagram for Electrolyte Calculations (10:14) (msu.edu)
Construction of a Sillien diagram involves several steps that are hard to follow from a textbook. This screencast goes through the steps of solving Example 18.5 from the Elliott and Lira textbook using the Sillen diagram. The problem asks for the pH of a solution that is 0.01 M NaOAc.
|14.04 LLE Using Activities||Click here.||80||1||
This sample calculation for methanol+benzene shows how to quickly generate the Tx binodal in Excel (uakron, 11min) using the Margules Acid-Base (MAB) model and the Excel iteration feature.(10min, uakron.edu) You generally need to start manually by setting the initial guess for the dilute component in each phase equal to the reciprocal of its infinite dilution activity coefficient. After a couple of iterations, you can set the "guess" cell equal to the "calculated" cell, and let Excel do the rest. Once you get one temperature right, you can usually just drag the fill handle to get the complete Tx diagram in short order. It is best to start at a low temperature to ensure that you detect LLE if it exists.
Note: This is a companion file in a series. You may wish to choose your own order for viewing them. For example, you should implement the first three videos before implementing this one. Also, you might like to see how to quickly visualize the Txy analog of the Pxy phase diagram. If you see a phase diagram like the ones in section 11.8, you might want to learn about LLE phase diagrams. The links on the software tutorial present a summary of the techniques to be implemented throughout Unit3 in a quick access format that is more compact than what is presented elsewhere. Some students may find it helpful to refer to this compact list when they find themselves "not being able to find the forest because of all the trees."
|13.03 - NTRL||Click here.||80||1||
NRTL concepts (2:30) (msu.edu)
The concepts on the development of the NRTL activity coefficient model.
1. What value does the NRTL model assume for the coordination number (z)?
|10.10 - Mixture Properties for Ideal Solutions||Click here.||80||1||
10.9 - 10.12 Mixture Properties Overview (6:53) (msu.edu)
This section of the text is thick with lots of equations. It may help to filter out the most important equations and results so that you have the perspective of the overall objectives of this section. There are a lot of equations in this section to show that the component fugacity in an ideal solution is simply the mole fraction multiplied by the pure component fugacity. In a liquid mixture, this is approximated as the mole fraction times the vapor pressure! This screencast goes on to preview the most important results of the next section to help you see the overall story.
|10.01 - Introduction to Phase Diagrams||Click here.||80||4||
Bubble, Dew, Flash Concepts and the Lever Rule (4:01) (msu.edu)
Understanding what is present (known) and not present (unkown) for a given state of a system will help you decide which routine to use. Notation is introduced for liquids, vapor, and overall compositions. Also, the lever rule concept is used throughout the chemical engineering curriculum, but it is important to see how to use compositions for the lever rule.
1. Which variables are fixed and which do you need to find in each of the following:
|01.2 Molecular Nature of Temperature, Pressure, and Energy||Click here.||76.7273||55||
Molecular Nature of Energy and Temperature (msu.edu) (3:34)
1. A 1m3 vessel contains 0.5m3 of saturated liquid in equilibrium with 0.5 m3 of saturated vapor. Which molecules are moving slower? (a) the vapor (b) the liquid (c) they are all the same.
2. A glass of ice water is sitting in your freezer, set to 0C and fully equilibrated. Which molecules are moving slower? (a) the gas (b) the liquid (c) the solid (d) they are all the same.
3. You walk into the kitchen in the morning to get some breakfast. The ceiling fan is on. You forgot your slippers. Which one is "hotter?" (a) the floor (b) the ceiling (c) the granite counter top (d) the air in the room (e) they are all the same.
|01.2 Molecular Nature of Temperature, Pressure, and Energy||Click here.||76.66670000000001||18||
Molecular Nature of Internal Energy: Thermal Energy