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Chem 131C. Lec. 16. Thermodynamics and Chemical Dynamics. The Chemical Potential (English)


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UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012)
Lec 16. Thermodynamics and Chemical Dynamics -- The Chemical Potential --
View the complete course: http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chemical_dynamics.html
Instructor: Reginald Penner, Ph.D.

License: Creative Commons BY-NC-SA
Terms of Use: http://ocw.uci.edu/info.
More courses at http://ocw.uci.edu

Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates are measured and calculated from molecular properties. Topics covered include: Energy, entropy, and the thermodynamic potentials; Chemical equilibrium; and Chemical kinetics. This video is part of a 27-lecture undergraduate-level course titled "Thermodynamics and Chemical Dynamics" taught at UC Irvine by Professor Reginald M. Penner.

Thermodynamics and Chemical Dynamics (Chem 131C) is part of OpenChem: http://ocw.uci.edu/openchem/

Recorded on May 9, 2012.


Index of Topics:
00:05 - Announcements:
01:41 - Today:
02:40 - The Chemical Potential
02:50 - ...from last Monday, and last Friday:
03:48 - useful | more useful
04:49 - Graph (What does...)
06:28 - How does G depend on temperature?
08:28 - The third law of thermodynamics...
09:50 - Graph
10:32 - We usually consider the temp. dependence of...
11:26 - This bad boy is called the Gibbs-Helmholtz Eq.
12:09 - This bad boy...(cont)
12:43 - Ok, now how does G depend on pressure...
13:54 - but, for phases, like solids and liquids, that are essentially...
14:17 - For ideal gases:
14:47 - conclusion: Gibbs energies of solids and liquids...
15:40 - The T-dependence of the Gibbs function:
17:31 - Now, as we transition (however briefly) into...
18:06 - How do individual reactant and product species...
18:17 - Matter matters: How is G affected by transfers...
18:45 - we haven't said much about open systems that exchange matter:
18:54 - consider the mixing of two isotopes of hydrogen (experiment)
21:10 - since G is an extensive variable
22:09 - we understand the T and P dependencies of G already...
23:57 - we know, after we open the valve, the isotopes will...
26:06 - combining these statements allows us to express...
28:05 - so with the valve open, mixing stops when...
29:33 - The partial molar Gibbs free energy is to..
32:34 - the partial molar Gibbs free energy (cont)
32:44 - The figure from your book really helps...
34:54 - the partial molar Gibbs free energy is too important
39:38 - exercise 16.4b: A mixture of ethanol and water is prepared...
42:34 - Now, we already understand that G is minimized upon an approach to equilibrium...
42:39 - In other words...
44:00 - This is called the Gibbs-Duhem Eq.
44:57 - Graph: This permits an understanding of thermal phase transactions:
45:36 - We already know how this works for, say, water:
49:13 - "the system "selects" the phase of lowest..."
49:24 - now, before we go further, let's clear up some mystery...


Required attribution: Penner, Reginald Thermodynamics and Chemical Dynamics 131C (UCI OpenCourseWare: University of California, Irvine),  http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chemical_dynamics.html. [Access date]. License: Creative Commons Attribution-ShareAlike 3.0 United States License.


Author:
Reginald Penner
Title:
Chancellor's Professor
Department:
Chemistry
Creative Commons License
Chem 131C (Spring 2012): The Chemical Potential by Reginald Penner is licensed under a Creative Commons Attribution-ShareAlike Unported 3.0 License
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