chap 4 - heat is added until the piston is just about to...

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EML 3100 Fall 2010 Instructor : Dr. J. N. Chung
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4 CHAPTER CHAPTER Work and Heat
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Example 4-1 A piston-cylinder device initially contains 0.4 m 3 of air at 100kPa and 80 o C. The air is now compressed to 0.1 m 3 in such a way that the temperature inside the cylinder remains constant. Determine the work done during the process and final pressure ?
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Example 3-3 Water with a mass of 1 kg at 75 o C initially is occupying a volume of 1.2 m 3 in a piston-cylinder device. At this time the piston, which has a weight that can impose a constant pressure of 101.35 kPa is resting on a set of lower stops. Identify the initial state. Then
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Unformatted text preview: heat is added until the piston is just about to float (or to rise). What is this new state and the system temperature ? Then the heat is continued until the piston just hits the two upper stops that allows the system to have a volume of 2.6 m 3 . What is the third state and new temperature when the piston just touch the stops ? 4 Example 4-2 Use the same process in Example 3-3 and find : A. Draw the P-v diagram B. The work done by the system from States 1-2-3 ?...
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chap 4 - heat is added until the piston is just about to...

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