ME320 solution10 - ME320 Thermodynamics Homework set #10...

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Unformatted text preview: ME320 Thermodynamics Homework set #10 Due: Tuesday 11/25/03 5:00pm, Please dropoff your homework at your TAs mailbox, Jolley 305. Section 1 (Chad Kessin), Section 2 (Johhny Hu) 1. Provide 12 sentence answers to the following questions. a. Does the temperature in the Clausius inequality relation have to be absolute temperature? Why? Yes. Because we used the relation Q H T H = Q L T L in the proof, which is the defining relation of absolute tempera- ture. b. Does the cyclic integral of heat have to be zero (i.e., does a system have to reject as much heat as it receives to complete a cycle)? Explain. No. A system may reject more (or less) heat than it receives during a cycle. For example, the stream in a steam power plant, receives more heat than it rejects during a cycle. c. Is there any way to increase the efficiency of a Carnot heat en- gine? By increasing T H or decreasing T L . 2. An insulted piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. An electric resistance heaterwater at a constant pressure of 150 kPa....
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ME320 solution10 - ME320 Thermodynamics Homework set #10...

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