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

The correct option is (e) η = 0.66

Step-by-step 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-(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-(27+273)/(627+273))*100`

η = 66.66 %