**Copyright Information:**Penner, Reginald Thermodynamics and Chemical Dynamics 131C (UCI OpenCourseWare: University of California, Irvine), http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chem... [January 28, 2015]. License: Creative Commons Attribution-ShareAlike 3.0 United States License. (http://creativecommons.org/licenses/by-sa/3.0/us/deed.en_US).

### Lecture Description

Recorded on April 6, 2012.

Slide Information

00:19 - Example-A certain atom has a threefold degenerate ground level...

01:02 - Function for Calculating Degeneracy of Energy Levels

01:24 - Sum of Three Energy Levels

03:35 - We need to calculate the thermal energy kT, in units...

04:22 - Energy Level Diagram

07:20 - Example: The four lowest electronic energy levels of atomic C have energies and degeneracies as follows...

07:51 - Equation: Partition Function

08:32 - In this case, q will have four terms - one for each state

08:49 - How to Calculate the Four Terms

09:59 - Example: 9.27 of 14 total states in C...

10:24 - does this makes sense (calculating thermal energy again)

10:56 - Diagram-Electronic States of Carbon

12:53 - now find the fractional population of each level for C...

14:51 - Diagram: ...now, it will be obvious to you that W must depend on energy...

15:45 - Partition Function (W must depend on energy, but how?)

20:03 - Example: the NO molecule has a doubly degenerate excited electronic level...

21:03 - Diagram--Wave Numbers

22:05 - Example - The NO molecule has a doubly degenerate excited electronic level... (continued)

22:40 - Plot (Diagram)

23:38 - Calculating Term Populations

### Course Index

- Syllabus, Homework, & Lectures
- The Boltzmann Distribution Law
- Energy and q (The Partition Function).
- Entropy
- The Equipartition Theorem
- The Rotational Partition Function
- Vibrational Partition Functions
- The First Law
- Law (review) & Adiabatic Processes Part II
- Jim Joule
- Midterm I Review
- Entropy and The Second Law
- The Carnot Cycle
- The Gibbs Energy
- Getting to Know The Gibbs Energy
- The Chemical Potential
- Finding Equilibrium
- Equilibrium In Action
- Observational Chemical Kinetics
- The Integrated Rate Law
- The Steady State Approximation
- Midterm Exam Review
- Lindemann-Hinshelwood Part I
- Lindemann-Hinshelwood Part II
- Enzymes Pt. II
- Transition State Theory
- The Final Exam

### Course 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.

Chemistry Dept. | Physical Sciences Sch. | University of California, Irvine