Question
1.
1240
isothermal Pressure maid na W isothermal .a V2 Volume

Consider the ideal Stirling cycle shown above, working between a maximum temperature of 600 K and a minimum temperature of 370 K and a minimum volume of 0.3 L and a maximum volume of 1.6 L. The working gas of the cycle is 0.10 mol of an ideal gas with c′v = 20.8 J/mol-K.

Note, +Q = heat absorbed by the gas and +W = work done by the gas.

      
Part Description Answer Chk History
A. What is the heat flow from state a to state b, Qab?
(include units with answer)

A: -515 J
C: -514.9 J

chk.png


Hints: 1,0
# tries: 2
B. What is the heat flow from state b to state c, Qbc?
(include units with answer)

A: 478.4 J
C: 478.4 J

chk.png


Hints: 1,0
# tries: 2
C. What is the heat flow from state c to state d, Qcd?
(include units with answer)

A: 835 J
C: 835.0 J

chk.png


Hints: 2,0
# tries: 3
D. What is the heat flow from state d to state a, Qda?
(include units with answer)

A: -478.4 J
C: -478.4 J

chk.png


Hints: 1,0
# tries: 1
E. What is the absolute pressure at state a?
(include units with answer)

A: 192 kPa
C: 192.3 kPa

chk.png


Hints: 1,0
# tries: 2
F. What is the absolute pressure at state b?
(include units with answer)

A: 1025 kPa
C: 1025 kPa

chk.png


Hints: 1,0
# tries: 1
G. What is the absolute pressure at state c?
(include units with answer)

A: 1662 kPa
C: 1663 kPa

chk.png


Hints: 1,0
# tries: 2
H. What is the work done in going from state a to state b, Wab?
(include units with answer)

A: -515 J
C: -514.9 J

chk.png


Hints: 1,0
# tries: 1
I. What is the work done in going from state b to state c, Wbc?
(include units with answer)

A: 0 J
C: 0.000 J

chk.png


Hints: 1,0
# tries: 1
J. What is the work done in going from state c to state d, Wcd?
(include units with answer)

A: 835 J
C: 835.0 J

chk.png


Hints: 1,0
# tries: 1
K. What is the work done in going from state d to state a, Wda?
(include units with answer)

A: 0 J
C: 0.000 J

chk.png


Hints: 1,0
# tries: 1
L. What is the efficiency of this cycle? (%) tud.png


3.2 pts.77%


2% try penalty
Hints: 1,2
# tries: 1

Just need L

0 0
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Answer #1

we know that efficiency is defined as - work done by the system - Heat absorbed by the system Heat AO = Heat absorbed DW = to320: 1 1313.4 / 2 = 0.24) 0.24 so, The Efficiency of the stailing cycle is 24%

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