SpecialProblems11-12

SpecialProblems11-12 - The partition separating the liquids...

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Special Problems for ME 200 – Fall 2009 Special Problems 11 & 12 Due Friday, September 25, 2009 SP11: Dry, saturated steam at a pressure of 20 bar having volume of 0.03 m 3 is contained within a piston-cylinder device. The steam is cooled at constant volume until the temperature reaches 200 ° C. The system is then expanded isothermally until the volume is twice the initial volume. (a) Sketch both the processes on a P-v diagram. (b) Determine the pressure (bar) at the end of the constant volume cooling process. (c) What is the change in internal energy (kJ) during the constant volume cooling? (d) Determine the pressure (bar) at the end of the isothermal expansion process. SP12: Consider three liquids that occupy three separate chambers of a rigid, well insulated tank.
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Unformatted text preview: The partition separating the liquids allows heat transfer but no mass transfer. Chamber 1 contains 5 kg of liquid A which has specific heat at constant pressure of 2.0 kJ/kg-K and is initially at a temperature of 100 ° C. Chamber 2 contains 2 kg of liquid B which has specific heat at constant pressure of 4.0 kJ/kg-K and is initially at a temperature of 50 ° C. Chamber 3 contains 1 kg of liquid C which has specific heat at constant pressure of 7.0 kJ/kg-K and is initially at a temperature of 40 ° C. The three liquids are allowed to come to an equilibrium temperature during a constant pressure process at 1 atm. Determine the final temperature ( ° C)....
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This note was uploaded on 05/15/2010 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University.

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