Exam1-StudyProbs

# Exam1-StudyProbs - PSS F08 ME326 Supplemental Study...

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PSS F08 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? [221.88 ft-lbf] (b) What fraction of the work is done in compressing the gas? [0.62 or 62%] (c) What fraction of the total work done by the piston is done in the first 2 in. of the piston travel? [0.41 or 41%] 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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## This note was uploaded on 09/26/2010 for the course ME 324 taught by Professor Neptune during the Spring '08 term at University of Texas.

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Exam1-StudyProbs - PSS F08 ME326 Supplemental Study...

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