HW02_Sol

# HW02_Sol - ° C 0.1 m3/kg d 10 kPa 10 ° C 3 Fill out the...

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ME 3513 – Thermodynamics I Solutions to Homework Assignment # 2 – Properties of a pure substance I 1. a) What is the percent change in volume as liquid water freezes? Mention some effects in nature and for our households the volume change can have. b) When you skate on ice a thin liquid film forms under the skate; how can that be? a) b)

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2. Determine whether water at each of the following states is a compressed liquid, a superheated vapor, or a mixture of saturated liquid and vapor. a. P = 10 MPa, v = 0.003 m 3 /kg b. 1 MPa, 190 ° C c. 200

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Unformatted text preview: ° C, 0.1 m3/kg d. 10 kPa, 10 ° C 3. Fill out the following table for substance water: P [kPa] T [ ° C] v [m3/kg] x a) 500 20 b) 500 0.20 c) 1400 200 d) 300 0.8 4. You want a pot of water to boil at 105 ° C. How heavy a lid should you put on the 15 cm diameter pot when Patm = 101 kPa? 5. A sealed rigid vessel has volume of 1 m3 and contains 2 kg of water at 100 ° C. The vessel is now heated. If a safety pressure valve is installed, at what pressure should the valve be set to have a maximum temperature of 200 ° C?...
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