Question 293: Thermodynamics & KTG

Question

A Carnot engine whose heat sinks at 27$^\circ$C, has an efficiency of 25%. By how many degrees should the temperature of the source be changed to increase the efficiency by 100% of the original efficiency?

Accepted Answer

Initially : ${1 \over 4} = 1 - {{300} \over {{T_H}}}$
$ \Rightarrow {T_H} = 400\,K$
Finally : Efficiency becomes ${1 \over 2}$
$ \Rightarrow {1 \over 2} = 1 - {{300} \over {T{'_H}}}$
$ \Rightarrow T{'_H} = 600\,K$
$\Rightarrow$ Temperature of the source increases by 200$^\circ$C.

Answer

Increases by 18$^\circ$C

Answer

Increases by 200$^\circ$C

Answer

Increases by 120$^\circ$C

Answer

Increases by 73$^\circ$C

Thermodynamics & KTG

A Carnot engine whose heat sinks at 27^\circC, has an efficiency of 25%. By how many degrees should the temperature of the source be changed to increase the efficiency by 100% of the original efficiency?

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