Thermodynamics Question 158

Question: In a Carnot engine, when T2=0oC and T1=200oC, its efficiency is η1 and when T1=0oC and T2=200oC , Its efficiency is η2 , then what is η1/η2

[DCE 2004]

Options:

A) 0.577

B) 0.733

C) 0.638

D) Cannot be calculated

Show Answer

Answer:

Correct Answer: A

Solution:

η=1T2T1=T1T2T1

η1=(473273)473=200473

and η2=27373273=200273

So required ratio η1η2=273473=0.577



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