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Did you carefully complete the reading assignment?
Molar specific heats is yet another example of how the "microscopic
thinking" of a physicist leads to a simple relationship for
macroscopic quantities. It's important to practice thinking like this.
(It's an acquired skill---it didn't come naturally for me)
Even if you answered yes to the previous question, the derivation
of molar specific heats for an ideal gas was probably still rather
murky. Please go back and carefully re-read that discussion. Explicitly right down
questions that you have as you go. If you can't answer them by the end of your
re-reading, let me know below and we'll discuss in class as much as
we have time for.
Yes, I carefully re-read
No, I didn't
On the P-V diagram, two processes are shown. For each one discuss
whether Q, W, and ΔE_int 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.
Was there anything that you didn't understand in the reading
assignment? If so, explain.
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