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TEST1 Solutions Afternoon.F07

# TEST1 Solutions Afternoon.F07 - TEST 1 Fall 2007 Afternoon...

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Unformatted text preview: TEST 1 Fall 2007 Afternoon YOU MUST SHOW ALL YOUR WORK PROBLEM I (20 points) (outcomes 1, 2, 3) An 80 liter vessel contains 4 kg ol‘R-134a at a pressure of 160 kPa. Determine. a) the temperature b) the volume occupied by the vapor phase PROBLEM 2 (30 points) (outcomes 1, 2, 3) A piston-cylinder device contains 1.2 kg ot‘stcam at 2 MPa and 500 l‘C. The steam is cooled at constant pressure until one-half of the mass condenses. a} Show the process on a 'l"-v diagram. b) What is the final temperature? c) Determine the change in total volume. PROBLEM 3 (30 points) (outcomes 1, 2, 3) _ Steam is contained in a closed rigid container with a volume of2 m3. Initially. the pressure and temperature of the steam is ?' bar and 500 “C, respectively. The temperature drops as a result of heat transfer to the surroundings. Determine a) the temperature at which condensation starts b) the fraction ol‘thc total mass that has condensed when the pressure reaches 0.5 bar c) the volume occupied by saturated liquid at this final state. CM" -.- ﬂéﬁﬂé(/-/sz/: £0,775”) I H 147. Zfﬂf’ﬂis 72=X27751+(/-Xz)2/;2 :ﬂsﬁyffﬁ) fpf(p.W//76;y:ﬂ ism/[:5 [/2 3/77”;/ 2(9-95W1'7 :0. ﬂé/fﬂ} A 1/; 1,/— 1/17, :57. emf—0.955%: a. Asaw’ L 1/; : % mega/73 ...
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TEST1 Solutions Afternoon.F07 - TEST 1 Fall 2007 Afternoon...

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