The efficiency of a heat engine in terms of the temperature of the reservoir and sink is defined as:
Correct answer: C. 1-T₂/T₁
- A. T₁/T₂
- B. 1+T₁/T₂
- C. 1-T₂/T₁
- D. T₂/T₁
Explanation
The maximum possible efficiency of a heat engine operating between a hot reservoir at temperature T₁ and a cold reservoir at temperature T₂ is given by the Carnot efficiency formula: η = 1 - (T₂/T₁).
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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