0031.1 - temperature. Sketch the two processes on a single...

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ME 3322 — Thermodynamics Name: Unit: 2 Level: 2 ID: 0031.1 Date: Helium with a mass of 0.5 kg is contained in a piston-cylinder assembly with stops as shown in the figure. The piston has a mass of 150 kg and a face area of 0.04 m 2 . The atmospheric pressure above the piston is 100 kPa. Initially, the piston is resting against the stops and the helium is at 100 kPa and 300 K. Determine the heat needed to double the volume, the temperature when the piston just lifts off the stops, and the final
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Unformatted text preview: temperature. Sketch the two processes on a single p-v diagram. Neglect any changes in kinetic and potential energy and ignore friction between the piston and the cylinder. Assume helium is an ideal gas with constant specific heats, a molecular mass of 4 kg/kmol, and k = 5/3. The universal gas constant is R = 8.314 kJ/(kmol·K). helium p atm = 100 kPa g Answer: Q 13 = 1238.1 kJ, T 2 = 410.33 K, T 3 = 820.66 K...
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This note was uploaded on 09/28/2010 for the course ME 3322 taught by Professor Neitzel during the Fall '07 term at Georgia Institute of Technology.

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0031.1 - temperature. Sketch the two processes on a single...

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