Wk_4_Recitation

# Wk_4_Recitation - Thermodynamics Week 4 Recitation Problems Week 4 Problem 1 An ideal piston/cylinder assembly filled with gas is attached

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Thermodynamics, Week 4 Recitation Problems Week 4 Problem 1 An ideal piston/cylinder assembly filled with gas is attached horizontally to the ocean floor, at a depth of 100 m. Assume that the density of seawater is 1100 kg/m 3 , and the local atmospheric pressure at the surface is 1 bar. The acceleration due to gravity is 9.81 m/s 2 . The cross-sectional area of the piston is 0.02 m 2 ; initially the volume of the gas in the assembly is 0.01m 3 . A diver tries to open the assembly by pulling on the piston. As the diver pulls, the gas expands in a quasi-static / quasi-equilibrium process following the relationship PV=constant. A. What is the absolute pressure (kPa) immediately outside the assembly? 117 9kPa B. Initially, what is the absolute pressure (kPa) inside the assembly? 1179 kPa C. What is the absolute pressure (kPa) inside the assembly when the volume is 0.011 m 3 ? 1072 kPa D. What force is exerted by the diver (kN) when the volume is 0.011 m 3 ? 2.144kN

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## This note was uploaded on 03/15/2010 for the course ENGRD 221 taught by Professor Staff during the Fall '08 term at Cornell University (Engineering School).

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Wk_4_Recitation - Thermodynamics Week 4 Recitation Problems Week 4 Problem 1 An ideal piston/cylinder assembly filled with gas is attached

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