SpecialProblems13-15

# SpecialProblems13-15 - are 40 C and 1 bar The internal...

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Special Problems for ME 200 – Fall 2011 Special Problems 13, 14, and 15 Due Friday, September 30, 2011 SP13: A well-insulated 0.1 m 3 tank contains 1 kg of an unknown refrigerant at 4.88 bar and 95 C. At these conditions, it is observed that the deviation of this refrigerant from ideal gas behavior (compressibility factor) is similar to that of steam at 2952 kPa and 310.6 C. What is the molecular weight (kg/kmol) of the unknown refrigerant? SP14: A rigid, insulated 3 m 3 tank is divided in half by an internal partition. Both sides contain an unknown monatomic ideal gas. Initially, the values of temperature and pressure in one of the sections are 200 C and 0.5 bar, respectively; while those values in the other section
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Unformatted text preview: are 40 C and 1 bar. The internal partition breaks and complete mixing occurs. (a) What is the final temperature ( C) of the gas? (b) Calculate the final pressure (bar) of the gas. SP15: Steam is leaving a pressure cooker whose operating pressure is 30 psia. The amount of liquid inside the pressure cooker is found to decrease by 0.4 gallon in 45 minutes when steady operating conditions are established. The cross-sectional area of the exit opening on the pressure cooker is 0.15 in 2 . (a) What is the mass flow rate of the steam (lbm/hr) at the exit? (b) Calculate velocity of the steam (ft/s) at the exit....
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