|Text Section||Link to original post||Rating (out of 100)||Number of votes||Copy of rated post|
|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.
|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?
|01.2 Molecular Nature of Temperature, Pressure, and Energy||Click here.||78.1818||22||
Molecular Nature of Internal Energy: Thermal Energy
|01.2 Molecular Nature of Temperature, Pressure, and Energy||Click here.||77.2727||66||
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.
|08.02 - The Internal Energy Departure Function||Click here.||73.3333||3||
The Internal Energy Departure Function (11min, uakron.edu) Deriving departure functions for a variety of equations of state is simplified by transforming to dimensionless units and using density instead of volume. This also leads to an extra simplification for the internal energy departure function.
1. What is the value of T(∂P/∂T)V - P for an ideal gas?
|13.04 - UNIQUAC||Click here.||73.3333||3||
UNIQUAC concepts (6:44) (msu.edu)
Concepts and assumptions used in developing the UNIQUAC activity coefficient method. This method introduced the use of surface area as an important quantity in calculation of activity coefficients.
|10.03 - Binary VLE using Raoult's Law||Click here.||73.3333||3||
Raoult's Law Calculation Procedures (11:45) (msu.edu)
Comprehension Questions: Assume the ideal solution SCVP model (Eqns. 2.47 and 10.8).
1. Estimate the bubble pressure (bars) of 30% acetone + 70% benzene at 333K.
|07.05 Cubic Equations of State||Click here.||73.3333||3||
Virial and Cubic EOS (11:18) (msu.edu)
1. To what region of pressure is the virial EOS limited at a given temperature? Why?
|04.02 The Microscopic View of Entropy||Click here.||72||5||
Principles of Probability III, Distributions, Normalizing, Distribution Functions, Moments, Variance. This screencast extends beyond material covered in the textbook, but may be helpful if you study statistical mechanics in another course. (msu.edu, 15min) (Flash)
|12.01 - The van der Waals Perspective for Mixtures||Click here.||70||4||
Mixing Rules (7:23) (msu.edu)
How should energy depend on composition? Should it be linear or non-linear? What does the van der Waals approach tell us about composition dependence? This screencasts shows that the mixing rule for 'a' in a random mixture should be quadratic. A linear mixing rule is usually used for the van der Waals size parameter.