Engineering Board Exam Reviewer · Thermodynamics · medium
A Carnot engine has an efficiency of 40% and rejects heat to a sink at 300 K. What is the source temperature?
- 750 K
- 420 K
- 500 K
- 180 K
Answer
C. 500 K
Solution
= 1 - TL/TH TH = TL/(1 - ) = 300/0.6 = 500 K.
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