1. The function G = U - ts + pV is often called the "free energy" by chemists, while it is often called the "thermodynamic potential" by physicists.
What do you think is the significance of G? (How is it useful? Why would people bother to define such a function?)
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2. Consider a mole of a monatomic ideal gas at room temperature. Quantitatively estimate the value of each of the terms which contribute to G. (Remember that G = U - ts + pV.) How does the value of G compare with the value of U? (Express your answers in Joules or in units of N*t.)
3. Which of the following is a true statement?
Check the correct answer: a) Extensive quantities scale with the number of particles in the system.b) Intensive quantities scale with the number of particles in the system.c) A quantity is sometimes intensive and sometimes extensive.d) Each energy (internal, Helmholtz, Gibbs) can be expressed just in terms of intensive quantities. 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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