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**Unformatted text preview: **91 :C (1490* S
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9733,5- S‘WJL 0.8(H7
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- mum 200 @0H5 0.7 ml.- VaP. {mm
, 140 363,53 1800 ‘ (9-5le7 560‘. lfgrwagmfﬁ. m
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80 500 335m un w 5e41,», a War Problem 4-27: Complete the table for refrigerant-134a: T, °C P, kPa v, mszlgg Phase description
-12 320 000074 9» Commas . l 30 770.0% 0.0065 Std: erap. mm 19-7 3 550 Q, 037% 0‘8 - Saturated vapor
60 600 0.0 wt 323 aﬂth View .00 W3 Can 00 {0W9 away {Mm m +4512; '. Problem 4-30: A piston-cylinder device contains 0.85 kg of refrigerant-134a at -10 °C. The piston that is free to
move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15 °C. Determine (a) the ﬁnal pressure, (b) the change in
the volume of the cylinder, and (c) the change in the enthalpy of the reﬁigerant-134a. _ $U+Ew11u
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pressure reads 50 kPa. If the atmospheric pressure is 100 kPa, determine the ﬁnal temperature of the gas. GAME—NH ' , . geHEVt/WC:
T, = 19617 “c
?i 3 9.80 (Nook gage P9,: 55 WM 8613?;
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H- _ 75_ k A _ _ - __ T‘; ' 3(300 D Problem 4-90: Determine the speciﬁc volume of superheated water vapor at 3.5 MPa and 450 °C based on (a)
the ideal-gas equation, (b) the generalized compressibility chart, and (c) the steam tables. Determinethe error
involved in the ﬁrst two cases. Cm BC RN35! 3025'. l>v1 v‘x’T g : (om/as QK)C7;23.15K) \/= s)
[3500 vé 0.0%35 M‘s/1‘3 CM m9.ng W Ar Water; Po : 5294—00 max T : GMTI k C . Sig PL ‘ 9am NJVLEJ Valium: 01587 Z = oCHoa
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