The coefficient of performance of a refrigera | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The coefficient of performance $(COP)$ of a refrigerator is given by the formula:$COP = \frac{T_L}{T_H - T_L}$where $T_L$ is the temperature insid

Vedclass · Accepted Answer

$31$

Vedclass · Answer

(B) The coefficient of performance $(COP)$ of a refrigerator is given by the formula:$COP = \frac{T_L}{T_H - T_L}$where $T_L$ is the temperature inside the freezer and $T_H$ is the temperature of the surroundings.First,convert the temperature from Celsius to Kelvin:$T_L = -20 + 273 = 253 \, K$.Given $COP = 5$,substitute the values into the formula:$5 = \frac{253}{T_H - 253}$$5(T_H - 253) = 253$$5T_H - 1265 = 253$$5T_H = 1518$$T_H = 303.6 \, K$.Now,convert the temperature back to Celsius:$T_H (^{\circ}C) = 303.6 - 273 = 30.6 \, ^{\circ}C \approx 31 \, ^{\circ}C$.

The coefficient of performance of a refrigerator is $5$. If the temperature inside the freezer is $-20\,^{\circ}C$,the temperature of the surroundings to which it rejects heat is ....... $^{\circ}C$.

Similar Questions

$A$ candle placed $25 \ cm$ from a lens forms an image on a screen placed $75 \ cm$ on the other side of the lens. The focal length and type of the lens are:

When acetaldehyde is reacted with $LiAlH_4$,what is the product formed?

In the symbiotic association between fungi and plants (mycorrhiza),which nutrient does the fungus absorb from the soil and provide to the plant?

When a person dies after being stung by a bee followed by the administration of penicillin,death may be due to:

Which layer of the uterus undergoes cyclical changes during the menstrual cycle?

Vedclass Test Series

Exam Paper Generator

Online Exam Module