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$^\circ$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?

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