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TH10Set03

TH10Set03 - Problem Set 3 PS3 due Monday May 24 PS3-1 2-44...

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Problem Set 3, PS3 due Monday May 24 Determine the temperature at which water will boil in Denver. In Denver the atmospheric pressure is 83.4 kpa. PS3-1 Water at 300 C and an unknown pressure is contained in a rigid tank. The tank is cooled and the water begins to condense at 180 C. Determine the initial pressure in the tank. Heat is added to water in a piston cylinder device until the contents are all vapor. There are 50 liters of water in the piston cylinder device initially at 25 C and 300 kPa. Determine a) the mass of the water, b) the final temperature, c) the total enthalpy change and sketch the process on a sketch of a temperature volume diagram of the process. PS3-1 PS3-3 Superheated water is allowed to cool to 250 F in a constant specific volume process. The initial condition of the steam is 180 psi and 500 F. What is the final pressure, temperature and enthalpy of the steam? Sketch a temperature volume property diagram for the process. PS3-4

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PS3-1 C 94.58 T 90) (95 .0838 95 T .0838 70.183 84.609 83.4 84.609 ratio 84.609 95 83.4 70.183 90 P T Table e Temperatur water From kPa 83.4 @ T T boiling boiling saturation
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