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posted by  yuuri on 8/12/2008 5:30:38 AM  |  status: Live  

help in thermodynamics

Course Textbook Chapter Problem
N/A Engineering Thermodynamics, 4th edition, M. David Burghardt 5 5.21
Question Details:
A 1-kg gaseous system in a piston-cylinder receives heat at a constant pressure of 350 kPa. The internal energy increases 2000 kJ, and the temperature increases 70°K. If the work done is 100kJ, determine (a) cp; (b) the change in volume.
ANSWER: (a) 4.286 kJ /kg-°K, (b) 0.286 m3

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posted by bradely(SME Mechan on 8/12/2008 8:22:39 AM  |  status: Live
Asker's Rating: Helpful   
yuuri's comment:
"thanks for the answer in (b)"
Response Details:
p1=p2=350 kPa
U2-U1=2000 kJ
T2-T1=700F
W1-2=100 kJ
W1-2=350(change in volume)
100=350(change in volume)
change in volume=100/350=0.286 m3
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