Chemistry 444
Elementary Statistical Mechanics!
Fall 2022
Northwestern University
 Instructor: Todd Gingrich
 Office: Ryan 4018
 Office Hours: Wednesday 45 pm, Ryan 4018
 Telephone: 5104578600
 Email: todd.gingrich@northwestern.edu

 TA: Jonah Greenberg
 Office: Ryan 4034
 Office Hours: Tuesday/Thursday 34 pm, 4026 Ryan Hall
 Email: JonahGreenberg2024@u.northwestern.edu
 Lecture: Tech L160
 Time: TuTh 9:3011am CST
 Midterm Exam: Thursday, November 10. Exam template [Solutions]
Please consult the course syllabus for course objective and policies.
The course website (this site) will be used to post lecture notes, special notes, homework assignments, and homework solutions.
Lecture notes:
 Tuesday, September 20, 2022: Introduction to the course, dynamics in chemistry, chaos, and ergodicity hypothesis. [Link]
 Thursday, September 22, 2022: Microcanonical entropy and systems with fluctuating energy. [Link]
 Tuesday, September 27, 2022: The Boltzmann distribution. [Link]
 Thursday, September 29, 2022: Connecting statistical mechanics and thermodynamics. [Link]
 Tuesday, October 4, 2022: The canonical ensemble and fluctuationresponse relations. [Link]
 Thursday, October 6, 2022: Legendre transforms  connecting partition functions and free energies. [Link]
 Tuesday, October 11, 2022: Reversible work theorem [Link]
 Thursday, October 13, 2022: Lots of Ensembles [Link]
 Tuesday, October 18, 2022: Ensemble Equivalence [Link]
 Thursday, October 20, 2022: Pulling on a Polymer [Link]
 Tuesday, October 25, 2022: Crooks Fluctuation Theorem [Link]
 Thursday, October 27, 2022: No Class due to IIN Symposium.
 Tuesday, November 1, 2022: Phase Coexistence [Link]
 Thursday, November 3, 2022: Ideal Gas Chemical Potential [Link]
 Tuesday, November 8, 2022: Crossovers versus Phase Transitions [Link]
 Tuesday, November 15, 2022: Ising Phase Transitions [Link]
 Thursday, November 17, 2022: Introduction to Monte Carlo [Link]
 Tuesday, November 22, 2022: Markov Chain Monte Carlo [Link]
Homework assignments
will normally be made available on this website by Thursday of
each week, and will be due on Friday of the following week at 5 pm.
Late work will only be accepted if arrangements
are made in advance or if there are particularly exceptional
circumstances.
 Problem Set 0, due Never! [PlottingDemo.ipynb]
 Problem Set 1, due Friday, September 30 at 5 pm. [BiasedCoinFlips.ipynb] [Solutions]
 Problem Set 2, due Friday, October 6 at 5 pm. [RandomLatticePolymer.ipynb] [Solutions]
 Problem Set 3, due Friday, October 14 at 5 pm. [Solutions]
 Problem Set 4, due Friday, October 21 at 5 pm. [Solutions]
 Problem Set 5, due Friday, October 28 at 5 pm. [Solutions]
 Problem Set 6, due Monday, November 7 at 5 pm. [Solutions]
 Assignment 7, due Friday, November 18 at 5 pm.
 Problem Set 8, due Wednesday, November 23 (or Friday, December 2) at 5 pm. [Ising1D.ipynb] [Ising2DFramework.ipynb] [Solutions]