1. The Helmholtz Free Energy F is defined by F = U - ts. Briefly, in words, what is the Helmholtz Free Energy, and why do you suppose it is not defined as F = U + ts instead?
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2. The average pressure on a system can be written in two terms, sometimes referred to as "energy pressure" and "entropy pressure." What are these terms, why are there two terms, and what's the importance (significance) of each term? Explain in your own words, with your explanation as physical as possible (i.e., think about a real system).
3. Consider a system S in thermal contact with a reservoir R. The volume of the system is held constant. Which of the following is true?
Check the correct answer: a) The system tries to have minimum energy and minimum entropy.b) The free energy of the system is a maximum.c) The free energy of the system is a minimum.d) The system cannot depart from its equilibrium configuration because the volume is held constant. Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.): You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.
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