t04_ps02_fall03

T04_ps02_fall03 - this process b For the second process an external pressure of p=500kPa is instantaneously applied to the gas in the cylinder What

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UNIFIED ENGINEERING Fall 2003 Ian A. Waitz Problem T4. (Unified Thermodynamics) A thermally-insulated piston-cylinder arrangement holds a thermally perfect gas at p 1 = 100kPa and T 1 = 300K. Assume that c p = 1.0035 kJ/kg-K, c v = 0.7165 kJ/kg-K, and R = 0.287 kJ/kg-K. You are to compare two processes. a) The first process is an adiabatic, quasi-static compression from p 1 = 100kPa to p 2 = 500kPa. What are T 2 and v 2 , and how much work was done by the system during
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Unformatted text preview: this process? b) For the second process, an external pressure of p=500kPa is instantaneously applied to the gas in the cylinder. What is the final state of the gas in the cylinder (T 2 , v 2 ), and how much work was done by the system during the process? c) Sketch both processes on a p ext-v diagram. Which process is a more efficient means of compressing the gas to 500kPa and why? (LO#4, LO#5)...
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This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.

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