Midterm Review; 5-10-17
Here are the notes for my discussion section the week of the midterm (5-8-17). I am going to do my best to briefly
summarize the major topics that have been covered during the course thus f
Lecture 18; 5/17/17
We are now going to begin discussing Phase Transitions. Consider the trajectory a system as we add energy (as heat).
Figure 1: Heating Trajectory. The energy entering the system raises the temperature o
Lecture 17; 5/15/17
Last lecture we considered Legendre Transforms of the Internal Energy, to determine new (potentially useful) Thermodynamic Potentials. We found some useful new friends in the Helmholtz Free Energy, The
Lecture 20; 5/22/17
On Wednesday and Friday we will look at Chapter 26 (due to Dr. Martens Traveling), so we will start this lecture
material, and re-visit it in a week.
Consider mixing gas A and gas B, both a
Lecture 13; 5/1/17
Note the midterm will be next Friday, May 12 during lecture. A single note card will be allowed in during the exam,
more details will be given before the exam.
Heat Capacity and Entropy
Consider a metal
Lecture 5; 4/12/17
Last Class we briefly mentioned Stirlings approximation as a method for evaluating the natural log of a factorial. The
approximation is valid for big systems (as N gets very large).
ln N ! N ln N N +
Lecture 11; 4/26/17
At the end of last lecture we found that our thermodynamic entropy equations for an ideal monoatomic gas had the
same volume and temperature dependence as the entropy definition from statistical therm
Lecture 7; 4/17/17
The exams will be roughly 50% easy questions everyone should be able to answer, then there will be some harder
problems, and the last question will be much more difficult than the remainder of the exam.
Lecture 4; 4-10-17
Professor Martens will hold office hours the hour before lecture (MWF 10-10:50 am; BCs Cavern on the Green the
food court near Bio Sci with the Subway sandwich shop). Note there is electronic
Final Review; 6-7-17
Here are the notes from my discussion section for the last week of the course (6-8-17). I am going to do my best to
briefly summarize the major topics that have been covered during the course b
Lecture 24; 6/2/17
Consider a container with pure A in both the liquid and vapour state. At equilibrium the chemical potential of the
liquid and gas must be equal. Our system only contains A (no other chemical species) so
Lecture 22 ; 5/26/17
Note: There will be no lecture on 5/29/17 Due to Memorial Day.
Previously in Thermodynamics, we entered the fascinating world of Chemistry with the reaction
Because we are working in closed s
Lecture 8; 4/19/17
Moving on to chapter 20 now, the main topic is entropy. Entropy really needs statistical mechanics for a proper
explanation, we will revisit this topic throughout the course.
You are told in pre
Lecture 14; 5/3/17
The exam is next Friday.You should be studying! This is the final lecture that will be covered on the exam (the
Carnot Cycle is the last topic). Note; I have taken the material from 5/5/17 that will be o
Lecture 12; 4/28/17
Last lecture we began to discuss Maxwells demon and an apparent violation of the second law. A demon would place
a partition within a box containing 1 molecule, then attaches a piston and do an isothe
Lecture 21; 5/24/17
The beauty of thermodynamics comes from the small number of assumptions needed to completely describe the topic.
The famous Thermodynamics book by Callen makes 4 claims at the beginning of the text, and
Lecture 10; 4/24/17
Consider some general system of N particles and S states. We would write the configuration as a set of cfw_N1 , N2 ,
N3 , , NS states, where we have N1 particles is state 1 and so on. We must account
Lecture 25; 6/5/17
This is the last lecture for the course! The exam will cover all of the material discussed throughout the course. It will
be 2 hours, and 3 standard note cards (the same dimensions as th
Lecture 9; 4/21/17
We have alluded to entropy being related to probability, in this lecture we are going to investigate some probability
theory. Consider flipping a coin, this system has 2 states (S=2) and there are M coi
Lecture 19 ; 5/19/17
If we want to characterize a phase transition we could look at the sharp spikes in heat capacity that occur during the
transition (the temperature does not change so our heat capacity becomes during th
Lecture 16; 5/8/17
Note; next lecture (5/10/17) will be a midterm review, and the exam will be (5/12/17). Therefore lecture notes will
begin again on (5/15/17).
We are now going to revisit the Second Law of Thermodynamics
Lecture 6; 4/14/17
Last lecture we started to look into the topic of thermodynamics. We talked about the internal energy (the thermodynamic energy) U. We know from conservation of energy, that the energy of an isolated sy
Lecture 23; 5/31/17
In Chapter 26 we discussed a chemical reaction, the spark notes go something like.
aA + bB *
) cC + dD
During a constant Temperature and Pressure process we found
i i d
We know that the
the Carnot cycle
Wednesday, May 2, 2012
Midterm scores are posted, and so is the key.
Please pick up your exam in discussion this week.
Questions about grading? Please see Steven and
Gianmarc rst - they
entropy and the 2nd Law
Monday, April 30, 2012
Midterm exams are graded and scores posted by
the end of the day. Thanks Steven and
You will need to pick up your exam in discussion
are you sitting in every other
ok, good. now, please ll in two
things on your scantron form:
1. your name.
2. your i.d. number.
in todays lecture:
The First Law review from Wednesday.
the First Law
Wednesday, April 18, 2012
Quiz 3 is Friday.
same drill as last Friday: Open everything
except computers (including tablets).
example: The triatomic molecule, chlorine dioxide (OClO) has
vibrational partition functions
Monday, April 16, 2012
Quiz 2 histogram
mean = 3.8
st. dev. 1.4
the symmetry number, , is the number of
indistinguishable orientations of a molecule.
Take SO3 (again):
the symmetry number, , i
Shane ([email protected])
Lecture 1; 4-3-17
The course will be using the big red book, McQuarrie and Simon Physical Chemistry. A Molecular Approach. The
intention is to cover some basic statistical mechan
Lecture 15; 5/5/17
This lecture (and all subsequent lectures) will not be on the midterm, but will appear on the final.
Free Energy Thermodynamic Potentials
As we have mentioned previously, other Thermodynamic Potentials b