MAE105A Sum11 HW2

MAE105A Sum11 HW2 - 3/lb(c Propane at p=1 MPa T =85C...

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MAE 105A Fundamentals of Engineering Thermodynamics HW #2 Prof. Ravnesh Spring 2011 Due in discussion (4/15/11) 3.5 (Except part e) Determine the phase or phases in a system consisting of H 2 O at the following conditions and sketch p-v and T-v diagrams showing the location of each state. (a) p=80 lbf/in. 2 , T=312.07 °F (b) p=80 lbf/in. 2 , T=400°F (c) T=400°F, p=360 lbf/in. 2 (d) T=320°F, p=70 lbf/in. 2 3.10 For H 2 O, determine the specified property at the indicated state. Locate the state on a sketch of the T-v diagram. (a) p=300 kPa, v=0.5 m 3 /kg. Find T, in °C (b) p=28 MPa, T=200°C. Find v, in m 3 /kg (c) p=1 MPa, T=405°C. Find v, in m 3 /kg (d) T=100 °C, x=60%, Find v, in m 3 /kg 3.12 For each case, determine the specified property at the indicated state. Locate the state on a sketch of the T-v diagram. (a) Water at v=0.5 m 3 /kg, p=3 bar, determine T, in °C (b) Ammonia at p=11 lbf/in. 2 , T=-20 °F determine v, in ft

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Unformatted text preview: 3 /lb. (c) Propane at p=1 MPa, T =85C, determine v, in m 3 /kg. 3.21 As shown in Fig. P3.21, a closed, rigid cylinder contains different volumes of saturated liquid water and saturated water vapor at a temperature of 150C. Determine the quality of the mixture, expressed as a percent. Fig. P3.21 3.22 As shown in Fig.P3.22, 0.1 kg of water is contained within a piston-cylinder assembly at 100C. The piston is free to move smoothly in the cylinder. The local atmospheric pressure and acceleration of gravity are 100 kPa and 9.81 m/s 2 , respectively. For the water, determine the pressure, in kPa, and volume, in cm 3 . Fig.P3.22 3.24 Water contained in a closed, rigid tank, initially saturated vapor at 200C, is cooled to 100C . Determine the initial and final pressures, each in bar. Locate the initial and final states on sketches of the p-v and T-v diagrams....
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MAE105A Sum11 HW2 - 3/lb(c Propane at p=1 MPa T =85C...

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