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Unformatted text preview: DCGN209Spring10: Homework#7 p. 1 of 4 I. Study Questions & Problems (not to hand in) . A. Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85 C. The gas expands isothermally against a constant opposing pressure of 400.0 kPa to a final pressure of 400.0 kPa. 1. Exactly 1.2028 moles of H 2 O, initially solid at 0.00 C & 1.000 atm, is completely converted to liquid at 0.00 C & 1.000 atm. mole J H fus 6010 = 2. Exactly 1.2028 moles of H 2 O, initially liquid at 100.0 C & 1.000 atm, is completely converted to gas at 100.0 C & 1.000 atm. mole J H vap 670 , 40 = 3. Exactly 1.2028 moles of He(g) initially exerts a pressure of 800 kPa at 26.85 C. The gas expands adiabatically and reversibly to a final pressure of 400.0 kPa. Answers w b Q U H 1. ~0 +7229 J +7229 J +7229 J 2. +3732 J +48,918 J + 45,186 J +48,918 J 3. +1665 J 0 1665 J 2775 J DCGN209Spring10: Homework#7 p. 2 of 4 B. For the following processes refer to an 1.2028 moles of Ar(g) a monatomic For the following processes refer to an 1....
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This note was uploaded on 02/08/2011 for the course DCGN 209 taught by Professor Simmons,e during the Spring '08 term at Mines.
 Spring '08
 Simmons,E

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