Question

A scientist says that the efficiency of his heat engine which operates at source temperature 127°C and sink temperature 27°C is 26%, then

• A. It is impossible
• B. It is possible but less probable
• C. It is quite probable
• D. Data are incomplete

Answer 1

Answer: (A)

It is impossible

Answer 2

${\eta\frac{T_{2}}{T_{1}}\frac{300}{400}\frac{1}{4}}_{\max}$

So 26% efficiency is impossible