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# ps2 - work(a How much heat ﬂows into the system along...

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Physical Chemistry 263. Prof. Jose A. Gascon Textbook: Atkins 8th Edition. Problem Set 2: The First Law. Due date September 18 2007 Problem 1 Calculate the work done by a perfect gas that expands adiabati- cally, going from an initial state T i , V i to a final state T f , V f . Show that under these conditions T f T i = V i V f 1 c where c = C V nR . Hint: integrate both sides of the equation found in the previous bullet. Problem 2 Show that the Joule-Thomson coefficient μ is equal to zero for a perfect gas. Hint: show that ( ∂H ∂P ) T = 0. Problem 3 When a system is taken from state A to state B along the path ACB in Fig. 1, 80 J of heat flows into the system and the system does 30 J of

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Unformatted text preview: work. (a) How much heat ﬂows into the system along path ADB if the work done is 10 J (b) When the system is returned from state B to state A along a curved path, the work done on the system is 20 J. Does the system absorb of liberate heat, and how much? (c) If U D-U A = +40 J, ﬁnd the heat absorved in the process AD and DB. 1 Figure 1: Problems from Atkins Chapter 2. Exercise 2.2(a), Exercise 2.4(a), Exercise 2.8(a), Exercise 2.14(a), Ex-ercise 2.22(a), Exercise 2.27(a), Problem 2.20. In 2.22(a), one of the equations is incorrectly balanced. 2...
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ps2 - work(a How much heat ﬂows into the system along...

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