Thermodynamics Question 305

Question: In Carnot engine efficiency is 40% at hot reservoir temperature T. For efficiency 50% what will be temperature of hot reservoir?

Options:

A) T5

B) 2T5

C) 6T

D) 6T5

Show Answer

Answer:

Correct Answer: D

Solution:

[d] η=1−T2T1

T1=T (Temperature of hot reservoir) For η=40

40100=1−T2T1⇒T2T=35⇒T2=35T For η=50

5001000=1−35TT1⇒T1=6T5

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