Exam1_StudyProbs - PSS 10/6/05 ME326 Supplemental Study...

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PSS 10/6/05 ME326 Supplemental Study Problems for Exam #1 E-Prob. 2.2.1.4 : A weightless and frictionless piston moves 4 in. against an ideal gas (that is, a gas with properties that obey Pv=RT) contained in a cylinder that has an inside diameter of 6 in. A spring is also within the cylinder, positioned as shown. The spring exerts no force on the piston in the initial position, but is touching the piston. The spring has a spring constant of 1500 lbf/ft. During the piston motion, the gas in the cylinder is maintained at 1 atm. (a) How much work was done by the piston? (b) What fraction of the work is done in compressing the gas? (c) What fraction of the total work done by the piston is done in the first 2 in. of the piston travel? x 6 in y E-Prob 3.10.2 : Nitrogen is contained in a bottle. Initially, the nitrogen is at 42 atm. and 130 K. The bottle has a volume of 0.02 m 3 . The bottle is then heated until the nitrogen reaches 202 K. (a) Can the nitrogen be treated as an ideal gas?
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Exam1_StudyProbs - PSS 10/6/05 ME326 Supplemental Study...

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