Question 313: 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: