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Thermodynamics and Chemical Dynamics 131C. Lecture 22. Midterm Exam Review.

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Thermodynamics and Chemical Dynamics (Chem 131C) is part of OpenChem: video is part of a 27-lecture undergraduate-level course titled "Thermodynamics and Chemical Dynamics" taught at UC Irvine by Professor Reginald M. Penner.Slide Information00:05 - some announcements00:44 - Chem 131 C Quiz 603:23 - Youtube search for Chem Lectures03:34 - chemistry lecture page with YouTube link03:53 - what does Midterm Exam 2 cover?04:46 - "what does Midterm Exam 2 cover?"06:12 - Papers about La Chatellier Principle06:52 - what was I thinking about? The ammonia synthesis reaction is:08:10 - what was I thinking about? Iron is a catalyst for this reaction in the Haber-Bosch process...13:38 - Problem I - entropy and the Carnot cycle (see especially Lecture 13)14:13 - entropy - statistical definition:14:32 - Diagram: now, there are three flavors of systems:15:05 - The Carnot Cycle15:16 - a heat engine extracts work from a temperature gradient.15:37 - Graph: The Carnot Cycle16:22 - Graph: ...ANY process can be decomposed into...18:12 - Graph: What do we know for sure?19:47 - how efficient is the heat engine?20:21 - Diagram (work over heat)20:39 - how efficient is a Carnot Cycle?22:47 - Graph: this pair...23:49 - let's prove this...24:03 - so the total work is:24:51 - Problem: What is the entropy change...25:08 - Since S is a state function we can write...26:08 - so represented in a Temperature-Entropy diagram, a Carnot cycle looks like this...26:33 - What if one or more steps of the process are irreversible?27:37 - and a more general statement of this is called the Claussius Inequality28:19 - This equation makes predictions about 3 types of processes:28:41 - some simple but important examples:29:18 - some simple but important examples: example - a reversible phase transition.29:51 - example - reversible heating/cooling of a gas.30:48 - rev. expansion/compression of a gas.31:45 - Calculating entropy changes for reversible processes on ideal gases:32:26 - because S is a state function...33:20 - Because S, like U, is a state function, you can add up...33:53 - Calculate the entropy change when...36:47 - Problem 237:09 - chemical potential of species...37:38 - really? yes, think about this way ("...partial derivative")38:24 should know...For more information and access to courses, lectures, and teaching material, please visit the official UC Irvine OpenCourseWare website at:

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