Physics · Thermodynamics
An inventor claims to have developed a reversible heat engine operating between a high-temperature reservoir at 150 °C and a low-temperature reservoir at 30 °C with an efficiency of 40%. Which of the following statements is true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The engine is possible because it has an efficiency less than 50%.
- 2The engine is impossible because it violates the First Law of Thermodynamics.
- 3The engine is possible as it obeys all the laws of thermodynamics.
- 4The engine is impossible because its claimed efficiency exceeds the maximum theoretical Carnot efficiency, violating the Second Law of Thermodynamics.✓
Correct answer
The engine is impossible because its claimed efficiency exceeds the maximum theoretical Carnot efficiency, violating the Second Law of Thermodynamics.
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