Midterm 2 Section 2

# Midterm 2 Section 2 - l|ll8203 Midterm 2 Name Section...

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l|ll8203 Midterm 2 Name: Section # Problem 1 (5 points): Outline the basic steps of solving a thermal/fluids problem as we discussed in class. 1. Define coordinate system 2. List assumptions 3. Define system and label it 4. lnvoke conservation laws and/or equilibrium laws 5. Invoke other equations ifnecessary 6. Solve problem 7. Check for reasonableness of the solution (units, order of magnitude, and sign) Grading policy: If you fail; provide anyof the steps 1-4 or 7, one point will be deducted (untilyour credit becomes 0 on this problem) 6,. liL. t" o*ui ' . 1

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ME203 Midterm 2 Name: Section # Problem 2 (60 points): One kilogram of water is enclosed inside a container. Initially, the water is a saturatedvapor with Pr : 5 bar. The water undergoes the following processes: l->2: constant volume process ends with P2:10 bar; 2->3: constant pressure end with water becoming a liquid-vapor mixture (quality x3:0.5); 3-+4: adiabatic ends with Pa:2bar (the totalwork during 3+4 is zero). Do the following: 1. Sketch the process 1-+4 on a p-v diagram (10 points) 2. Determine
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• Spring '08
• JimQiao
• Trigraph, constant pressure process, p-v diagram points, constant process volume, List assumptions Define, equilibrium laws Invoke

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Midterm 2 Section 2 - l|ll8203 Midterm 2 Name Section...

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