What is efficiency of heat engine ? Calculate the maximum efficiency of an engine operating between 121°C and 27°C

Question

What is efficiency of heat engine ? Calculate the maximum efficiency of an engine operating between 121°C and 27°C

Answer

The ratio of the work obtained in a cyclic process (w) to the heat taken from the high-temperature reservoir (q) is referred to as the efficiency of a heat engine.

$η = 1 - \frac{T _{2}}{T _{1}}$
Initial efficiency is $= 1 - \frac{2 7 + 2 7 3}{1 2 7 + 2 7 3}$ = 1- 0.75

$= 0 . 25$
Considering all the four options,
$η_{m a x} = 1 - \frac{2 5 0}{4 0 0} = 0.375$
maximum efficiency = 0.375

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What is efficiency of heat engine ? Calculate the maximum efficiency of an engine operating between 121°C and 27°C

η=1−T1​T2​​Initial efficiency is =1−127+27327+273​ = 1- 0.75

= 0.25Considering all the four options,ηmax​=1−400250​=0.375 maximum efficiency = 0.375

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$η = 1 - \frac{T _{2}}{T _{1}}$
Initial efficiency is $= 1 - \frac{2 7 + 2 7 3}{1 2 7 + 2 7 3}$ = 1- 0.75

$= 0 . 25$
Considering all the four options,
$η_{m a x} = 1 - \frac{2 5 0}{4 0 0} = 0.375$
maximum efficiency = 0.375