PHYS 2101 Lecture : Lecture 39
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However, there"s one additional hw posted, hw #15, which optional. I"ll post the key right away because that material will be covered on the final. Final exam: tuesday - may 8, 5:30 - 7:30 pm (place - tba) The gure represents an adiabatic compression of 1 mole of an ideal gas from 15 m3 to 12 m3, followed by an isothermal compression to a nal volume of 3 m3 . 0th law thermal equilibrium: a = b & b = c then a = c. 1st law conservation of energy: eint = q - w. Change in internal energy = heat added minus work done by. 2nd law heat flows naturally from hot object to a cold object. Heat will not ow spontaneously from cold to hot. Entropy, s, like t,v, p, eint, and n is state variable. The entropy of a closed system (no energy and no mass comes in and out) never decreases.
