A certain Carnot engine has Th = Tc + 35K, and an efficiency of 20.0%. What...

Question

Question

A certain Carnot engine has Th = Tc + 35K, and an efficiency of 20.0%. What is Th?

A) 140 K B) 175 K C) 210 K D) 245 K

Please explain.

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Answer 1

Answer #1

By Efficiency(E) = 1 - Tc/Th

=>20/100 = 1 - Tc/Th

=>Tc = 0.80Th -----------------(i)

=>Th = Tc + 35K (given) ------(ii)

=>By (i) & (ii) :-

=>0.20Th = 35K

=>Th =175 K

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Answer 2

Answer #2

B) 175 K

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Answer 3

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