1. Which of the following engines is/are allowed (select all that apply): A. Qh = 3000...
1. Which of the following engines is/are allowed (select all that apply):
A. Qh = 3000 J; QC = 2000 J; W = 1000 J
B. Qh = 3000 J; QC = 1000 J; W = 1000 J
C. Qh = 3000 J; QC = 1500 J; W = 2000 J
D. Qh = 3000 J; QC = 0 J; W = 3000 J
2. What is the COP of a heat pump which takes in 4 kJ of energy from the outside and expels 6 kJ to your house in every cycle?
A. 0.3 B. 1.5 C. 3.0 D. 4.0 E. 6.0
3. Three engines operate between reservoirs separated in temperature by 300 K.
Engine A: TH = 1000 K, TC = 700 K
Engine B: TH = 900 K, TC = 600 K
Engine C: TH = 500 K, TC = 200 K
Rank the engines by their maximum possible efficiencies.
A. A > B > C
B. A > C > B
C. B > A > C
D. B > C > A
E. C > B > A
F. C > A > B
Homework Answers
1. A. Qh = 3000 J; QC = 2000 J; W = 1000 J.
For heat engine Qh=W +Qc, where Qc>0.
Add Answer to:
1. Which of the following engines is/are allowed (select all
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