A) 325°C
B) 325K
C) 39°C
D) 320°C
Correct Answer: C
Solution :
Coefficient of performance \[K=\frac{{{T}_{2}}}{{{T}_{1}}-{{T}_{2}}}\]Þ\[5=\frac{(273-13)}{{{T}_{1}}-(273-13)}=\frac{260}{{{T}_{1}}-260}\] Þ \[5{{T}_{1}}-1300=260\]Þ \[5{{T}_{1}}=1560\] Þ \[{{T}_{1}}=312K\to 39{}^\circ C\]You need to login to perform this action.
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