Question 255: Thermodynamics & KTG

Question

A Carnot engine has efficiency of $50 \%$. If the temperature of sink is reduced by $40^{\circ} \mathrm{C}$, its efficiency increases by $30 \%$. The temperature of the source will be:

Accepted Answer

$1 - {{{T_L}} \over {{T_H}}} = 0.5$ ...... (1)
$1 - {{{T_L} - 40} \over {{T_H}}} = 0.65$ .... (2)
$ \Rightarrow {T_H} = {{800} \over 3}\,K \simeq 266.7\,K$

Answer

166.7 K

Answer

255.1 K

Answer

266.7 K

Answer

367.7 K

Thermodynamics & KTG

A Carnot engine has efficiency of 50 \%. If the temperature of sink is reduced by 40^{\circ} \mathrm{C}, its efficiency increases by 30 \%. The temperature of the source will be:

Choose the correct answer: