SpecialProblems11-12

SpecialProblems11-12 - The initial temperature and pressure...

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Special Problems for ME 200 - Spring 2011 Problems Due February 11, 2011 SP 11: Steam contained in a piston-cylinder device is cooled slowly at a constant pressure of 700 kPa. The mass of the steam is 2.2 kg. The initial volume is 1.0267 m 3 and final volume is 0.75 m 3 . Find a) the initial and final temperature (°C) of the steam, b) the work (kJ), and c) the heat transfer (kJ) associated with this process. SP 12: Heat is added to 4 kg of water in a rigid tank.
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Unformatted text preview: The initial temperature and pressure of the water are 20C and 2.5 MPa respectively. The final water temperature is 40C. Find the heat transferred (kJ) to the water by three different methods: a) Using compressed liquid water tables b) Using the saturated water (liquid-vapor) table. (Hint: make an approximation to obtain the compressed liquid state). c) Using constant specific heats (use the value for water at 300K)....
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