When does any refrigerator or heat pump work?

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

Question

(A) refrigerator or a heat pump is a device that transfers heat from a cold reservoir to a hot reservoir. According to the $Second$ $Law$ of $Thermody

Vedclass · Accepted Answer

When external work is done on the system.

Vedclass · Answer

(A) refrigerator or a heat pump is a device that transfers heat from a cold reservoir to a hot reservoir. According to the $Second$ $Law$ of $Thermodynamics$ (Clausius statement),heat cannot spontaneously flow from a colder body to a hotter body. Therefore,to achieve this transfer,external work must be performed on the system. Thus,a refrigerator or heat pump works only when external work is done on the system.

Similar Questions

$A$ Carnot engine,having an efficiency of $\eta = 1/10$ as a heat engine,is used as a refrigerator. If the work done on the system is $10 \ J$,the amount of energy absorbed from the reservoir at a lower temperature is ....... $J$.

Obtain the formula for the coefficient of performance of a Carnot refrigerator.

Assertion $(A)$: $A$ room can be cooled by opening the door of a refrigerator in it.
Reason $(R)$: Heat always flows from a body at higher temperature to a body at lower temperature.

The power of a refrigerator that can make $15 \ kg$ of ice at $0^{\circ}C$ from water at $30^{\circ}C$ in one hour is: (in $W$)

The door of an operating refrigerator is kept open. As a result,the temperature of the room will

Vedclass Test Series

Exam Paper Generator

Online Exam Module