Question 3 - An inventor claims to have invented 4 engines, each of which operates between constant -temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. Does each engine violate either or both of the laws? 1st law hint: Think about the quantity of work. 2nd Law hint: Think efficiency of the process. Engine 1 QH (J) QL (j) W (J) Violates 2nd Law? Violates 1st Law? 200 -175 40 500 -200 400 600 -200 400 100 -90 10 234
Question 3 - An inventor claims to have invented 4 engines, each of which operates between constant -temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. Does each engine violate either or both of the laws? 1st law hint: Think about the quantity of work. 2nd Law hint: Think efficiency of the process. Engine 1 QH (J) QL (j) W (J) Violates 2nd Law? Violates 1st Law? 200 -175 40 500 -200 400 600 -200 400 100 -90 10 234
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Transcribed Image Text:Question 3 - An inventor claims to have invented 4 engines, each of which operates between constant
-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to
evaluate the engines. Does each engine violate either or both of the laws?
1st law hint: Think about the quantity of work. 2nd Law hint: Think efficiency of the process.
Engine QH (J)
200
QL (j)
W (J)
Violates 1st Law?
Violates 2nd Law?
1
-175
40
2
500
-200
400
3
600
-200
400
4
100
-90
10
Show the calculations that justify your answers.
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