TESTrepeatmorningsolutions - TEST 1 — repeat Fall 2006...

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Unformatted text preview: TEST 1 — repeat Fall 2006 Morning PROBLEM I (30 points) Outcome 2 A piston~eylinder deviee contains 1.2 lbm of ammonia at 20 psia and 80 “F. The ammonia is cooled at constant pressure until one-half of the mass condenses. a") Show the process on a T-v diagram. b) What is the final temperature? c) Determine the change in volume PROBLEM 2 (30 points) Outcome 2 A sealed rigid vessel of 2 m3 contains a saturated mixture of vapor and liquid R- l34a at l2 nC. It‘the mixture is heated to 52 "C, the liquid phase disappears. a) Find the pressure at 52 0C b) The initial mass ofliquid c) Sketch the process on a 'l‘-v diagram. Make sure to clearly show the initial and final states. PROBLEM 3 (20 points) Outcome 2 A l m3 tank containing air at 25 “C. and 500 kPa is connected through a valve to another tank containing 5 kgm of air at 35 UC and 200 kPa. The valve is opened and the entire system is allowed to reach thermal equilibrium with the surroundings at 20 “C. Determine, a) The volume of the second tank. and b) The final pressure in the system. a j T 2 2 “9:20 .r/éz m 7 fl 7, =- m. 7a2’5" 747%,, =2 WW7” =/z(/;-,75Jj c) W; 2 2:7 yz yap-7(1) y/z mgr/,2, f/y7j,ap.5{aiz3‘?,2j z. s 5. féffifl, vK—"flzféfiwj :02 40/2!) 4V://z’//: "/flfyészi ff flffl a WwZ/rzamsj : W? 7%?” xfiérfl/xg’ f/fiflz fi-fl3g’g 3?” ' 77%;? $72252? 7c, / 7512/; a7 5 - Big/é; Vsr; .= . fl “‘9 / a 3'72 N/flfl’fm W; Jr} _ fl-fl/fZ—fl-PZWW'; F r”: _ i-aWfl-‘fl'WWX/i‘fi J'ng; % 2 3 #7 = w;- 2 : /Wfl0’/€7M ’ fl-i/fzgf 17/, V #59. 36'- 9/739 #7“: fizfléq ...
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TESTrepeatmorningsolutions - TEST 1 — repeat Fall 2006...

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