Warm-Up Exercise 9

Due 12:15 pm, Mon 17 Sep 2012

Physics 123, Fall 2012

Reading assignment: 21.2-21.4


On the P-V diagram, two processes are shown. For each one discuss whether Q, W, and ΔEint are positive, negative, or zero.

Near the end of section 21.3 (page 608 in the 8th edition of our text), the book talks about "taking the total differential." What does that mean? (Doing this is another acquired skill that is good to practice.)


Explain why some modes (vibrational or rotational) do not contribute to the specific heat except at higher temperatures.