PHY 3513 Fall 2000 โ Extra Credit Assignment
This assignment is voluntary. You can use it to earn up to 25 points extra credit, or 8.33%
of the total score computed from the three exams and the homework.
Answer as many of the questions as you like. The maximum points for each question are
indicated in square brackets. To obtain full credit, you must explain your reasoning and show
all working. Please write neatly and include your name on the front page of your answers.
This assignment is due no later than 5 p.m. on Friday, December 15. Please hand
your answers to Kevin Ingersent personally, or push them under his office door if he is
absent. Do not leave them in a Physics Department mailbox.
1. Callen Problem 5.3โ1 [5 points].
Recall that we found the Helmholtz free energy in class, and that we went out of
our way to eliminate s0(the molar entropy in the reference state โ0โ) from the final
expression. In doing this problem, you may leave s0in your answers.
2. Callen Problem 5.3โ3 [3 points].
3. Callen Problem 5.3โ7 [3 points].
4. Callen Problem 5.3โ13 [4 points].
5. Callen Problem 6.2โ1 [2 points].
6. Callen Problem 7.2โ2 [1 point].
7. Callen Problem 8.1โ2 [2 points].
8. Callen Problem 8.2โ1 [5 points].