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Unformatted text preview: MAE 110A Fall 2009 HW #3
Due: Friday, Oct 16, 1100am Handout Problem: 1 (3 points) Circle the correct answer. i N. (MM
1. Pressure I v is an extensive property.
.0 a scalar. i
 depends only on the vertical coordinate.
 is always uniform in a system.
 is tangential stress.
2. Work
 is a system property.
 depends only on state.
 is the same as kinetic energy.
1' always has the same magnitude as heat.
'10 is pathdependent. 3. Internal energy '  is a form of macroscopic energy. '._  is a property.  is always greater than kinetic energy in magnitude.
 is the same as work. 2. {7 points) A closed system consisting of 5 kg of gas undergoes a process during which the relationship
between pressure and volume is pv”3 = constant. The process begins with p; : 1 bar, v1 = 0.2 m3/kg and
ends with p2 = 0.25 bar. Determine the final volume and plot the process on a graph of pressure versus
specific volume. What is the work done by the system during the process? 3. (10 points) A tank is filled with 50 cm of oil (56 0.8} overlaying 50 cm of water (SG 1.0]. A pipe leads
away at an angle from the bottom of the tank. if 2.13 m of the pipe is filled with water, what is the angle
the pipe makes with the horizontal? 4. (5 points) Saturated liquid water at 310°C undergoes an isotropic process {constant volume) to 0.35
MPa. Determine the final fluid phase and the enthalpy change. Plot Tv diagram. .. ; is onlyimportantforopen systems. ' 4 ~ I... _ " l ' t a a [Probiem Z.:
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 Fall '07
 Smith
 Thermodynamics, Energy, Kinetic Energy, Saturated liquid water, MAE 110A Fall, Plot Tv diagram

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