bmb428_problemset08

bmb428_problemset08 - BMB428 Physical Chemistry with...

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BMB428 Dr. Song Tan Physical Chemistry with Biological Applications Fall 2007 Problem Set 8: The Second Law of Thermodynamics Due Sept 25, 2007 The goal of these problems is show you that the property which we call entropy s a useful predictor of whether a process will be spontaneous. In many of the following problems , you will calculate the entropy for processes which you know happen spontaneously. 1. State the second law of thermodynamics. 2. Imagine an ideal gas trapped in the following device: V i V f initial final The ideal gas has an initial volume of V i as shown on the left. The piston is prevented from moving by the first set of black stops. This entire device is contained inside a container. During this experiment, the temperature T inside the container does not change. The first set of stops are removed, and the piston spontaneously moves to the back of the device in a reversible process. The final volume of the ideal gas is V f . (a)
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bmb428_problemset08 - BMB428 Physical Chemistry with...

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