The efficiency of a Carnot engine operating between reservoirs maintained at temperatures 27°C and =123°C is:

Question

The efficiency of a Carnot engine operating between reservoirs maintained at temperatures 27°C and =123°C is: (A) 0.75 (B) 0.4 (C) 0.25 (D) 0.5

Tardigrade Admin · Accepted Answer

The efficiency (η) of Carnot engine is defined as the amount of work divided by the heat transferred between the system and the hot reservoir. i.e., η =(Δ W/Δ QH)=1-(TC/TH) Given, TH=27°C=273+27=300 K, TC=-123°C=273-123=150 K ∴ η =1-(150/300)=0.5

Q. The efficiency of a Carnot engine operating between reservoirs maintained at temperatures 27∘C and =123∘C is:

0.75

0.4

0.25

0.5

The efficiency (η) of Carnot engine is defined as the amount of work divided by the heat transferred between the system and the hot reservoir. i.e., η=ΔQH​ΔW​=1−TH​TC​​ Given, TH​=27∘C=273+27=300K, TC​=−123∘C=273−123=150K ∴η=1−300150​=0.5

Q. The efficiency of a Carnot engine operating between reservoirs maintained at temperatures $2 7^{\circ} C$ and $= 12 3^{\circ} C$ is: