Download Exam 2 - 3 Questions on Thermodynamics I with Solutions | ME 20000 and more Exams Thermodynamics in PDF only on Docsity! ME 200 Spring 2007
Exam 2
Tuesday March 6
* You may use only your own book, your own notes (this includes course
instructor notes you have written on) and any quizzes you were given in
class.
* You may not use any additional material, such as another persons notes,
other books, technical papers, solution manuals, old exams, anyone else's
homework, etc.
«* You must turn off all communications devices before starting this exam,
place them under your seat out of sight, and leave them off until you exit
the examination room,
* You must place all materials, other than your calculator, pencil, eraser,
book/notes, and this exam under your seat and not move them until you
leave the exam hall for the last time this evening. Recall that this includes
any communications devices.
* You must interpolate when necessary. You will not obtain full credit if you
choose “the closest answer.”
* You must follow the problem solution format to obtain full credit.
Name: Thermo No;
CIRCLE YOUR DIVISION
Diy. 1 (830) Div. 2 (1030) Div. 3 (1230) Div. 4 (230)
Prof. Sojka Prof. Abraham Dr. Tree Dr. Son
Problem Score
1 (34 pts)
2 (46 pts)
3 (20 pts)
Total
1. (Part a is worth 12 pts, part b is worth
4 pts, and part is worth 18 pts) A | Ty= 5406
new house is to be heated using a Carnot Q,, = 10500 kd
heat pump. The work required to operate W.
the heat pump is supplied by a Carnot = E)
heat engine. A schematic of the Q&
combined heat pump-heat engine system ".
is shown at right, losses House T = 25 C
Although the heat pump and heat engine
are both ideal devices, only 50% of the
work produced by the engine is received
by the heat pump.
Te 25C
a. Determine the magnitude of the work produced by the heat engine. Report
your answer in kJ.
b. Determine the magnitude of the work received by the heat pump. Report
your answer in kJ.
c. Determine the total amount of heat transferred to the house, by adding the
heat transferred from the heat engine to the house to the heat transferred
from the heat pump to the house. Report your answer in kd.
Ba Cornet Aawiets Qe — Th, (PB sso Og = MPM
Oke > (214 +8 }
Qe te Gwe] | rose Bl
Que - iw es (25123) on ang = Qe” Sep
Ga Te (S407)
2 (WR, - Gq = O07 Sq
Qegt BABS ET = Apr bi
i O.gth
hy = OID a
Q = Gc, + One =\satos eT
