Question

What is the approximate theoretical maximum efficiency of a heat engine receiving heat at 627°C and rejecting heat to 27°c? a)-23.2 b)-0.96 c)-0.04 d)-0.33 e)-0.66

Answer 1

Answer:

The correct option is  (e) η = 0.66

Explanation:

given data:

temperature at entry is 627 degree C

temperature at exit is 27 degree C

the efficiency of a engine is given as η

$\eta = (1-\frac{T_{L}}{T_{H}})*100$

where $T_{L}$ is temperature in kelvin at exit point

          $T_{H}$ is temperature in kelvin at entry point

$\eta = (1-\frac{27+273}{627+273})*100$

η = 66.66 %