recition3

# recition3 - Recition 3 Solution September 16, 2004 Known...

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Recition 3 Solution September 16, 2004 Known Argon and water in a cylinder separated by a frictionless piston. Argon is added slowly through an isothermal process. Mass,volume and temperature are known. Find initial and Fnal pressure, the mass of added argon, the work done on the water, the p-v diagram and whether futher addition of mass will make the water all liquid. Schematic and given data A: Argon Initial state m A 1 = 42 . 8 g, T A 1 = 50 C , V A 1 = 0 . 233 m 3 . Fianl state m A 2 =? , T A 2 = 50 C , V A 2 = 0 . 35 m 3 . B: Water Initial state m B 1 = 100 g, T B 1 = 50 C , V B 1 = 0 . 267 m 3 . 1

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Fianl state m B 2 = 100 g, T B 2 = 50 C , V B 2 = 0 . 15 m 3 . Assumptions 1. ”slow” implies qusi-equilibrium. 2. H 2 O cannot be assumed as ideal gas. 3. Ar might be ideal gas but need check. Analysis A) First fnd the state o± water. Look up table A-2. For T = 50 C: v f = 1 . 0121 × 10 - 3 m 3 /kg, (1) v g = 12 . 032 m 3 /kg, (2) p s = 0 . 1235 bar = 12 . 35 kP a. (3)
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## This note was uploaded on 03/15/2010 for the course ENGRD 221 taught by Professor Staff during the Fall '08 term at Cornell.

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recition3 - Recition 3 Solution September 16, 2004 Known...

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