Special Problems for ME 200 – Fall 2009 Special Problems 27, 28, and 29 Due Friday, November 6, 2009 SP27: One kilogram of ice at 0C is added to 7 kg of water at 30C and 1 bar. The enthalpy of melting for ice is 335 kJ/kg. Consider that the process is adiabatic. (a) What is the final equilibrium temperature (C)? (b) Calculate the entropy production (kJ/K) during this process. SP28:An insulated rigid tank initially contains 2.7 kg of carbon dioxide gas at 100 kPa and 27C. A rotating paddle wheel adds 200 kJ of work into the system. Assume that specific heats for carbon dioxide are constant at their 27C values. (a) What is the final temperature (C) of carbon dioxide? (b) Calculate the entropy change (kJ/K) for carbon dioxide during this process. Now consider that specific heats for carbon dioxide are not constant. (c) What is the final temperature (C) of carbon dioxide? (d) Determine the entropy change (kJ/K) for carbon dioxide during this process.
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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.