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Unformatted text preview: ME320 Thermodynamics Homework set #3 Due: Wednesday 9/24/03 at the start of class 1. Determine whether water at each of the following states is a com pressed liquid, a superheated vapor, or a mixture of saturated liq uid and vapor: (Tables A2 and A3 may be useful. Recall that 1 bar = 100 kPa.) (a) 10 MPa, 0.03 m 3 /kg (b) 1 MPa, 190 C (c) 200 C, 0.1 m 3 /kg (d) 10 kPa, 10 C Solution: Using Table A4 to A6, (a) 10 MPa, 0.03 m 3 /kg, f = 0 . 001452, g = 0 . 01803m 3 /kg, so its superheated vapor. (a) T > T sat = 179 . 91 C, so its superheated vapor. (a) < g = 0 . 12736 m 3 /kg, so it is two phase. (a) P > P g = 1 . 2276 KPa, so its compressed liquid. 2. Fill out the following table for water: T ( C) P (kPa) (m 3 /kg) Phase description 140 ? . 48 ? ? 800 ? Saturated liquid 25 750 ? ? 500 ? . 130 ? Solution: Similar to problem 1, using tables A4A6, T[ C] P [kPa] v[ m 3 /kg] Phase description 140 361.3 . 48 Saturated mixture 170 . 43 800...
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This note was uploaded on 04/11/2008 for the course MASE 320 taught by Professor Shen during the Spring '08 term at Washington University in St. Louis.
 Spring '08
 Shen

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