Assertion (A): A room can be cooled by openin | vedclass

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

Question

(D) When the door of a refrigerator is opened,the refrigerator extracts heat from the inside and releases it into the room. Additionally,the work done

Vedclass · Accepted Answer

$(A)$ is false but $(R)$ is true.

Vedclass · Answer

(D) When the door of a refrigerator is opened,the refrigerator extracts heat from the inside and releases it into the room. Additionally,the work done by the compressor to run the refrigerator is also converted into heat and released into the room. Therefore,the net effect is an increase in the room's temperature rather than cooling it. Thus,Assertion $(A)$ is false.The Reason $(R)$ states that heat flows from a higher temperature body to a lower temperature body,which is a fundamental principle of thermodynamics (Second Law of Thermodynamics). Thus,Reason $(R)$ is true.

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.

Similar Questions

The temperatures inside and outside of a refrigerator are $260 \ K$ and $315 \ K$ respectively. Assuming that the refrigerator cycle is reversible,calculate the heat delivered to the surroundings for every joule of work done. (in $.73$)

The temperature inside a refrigerator is $t_2 \, ^\circ C$ and the room temperature is $t_1 \, ^\circ C$. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be:

$A$ Carnot engine having an efficiency of $1/5$ as a heat engine is used as a refrigerator. If the work done on the system is $50 \ J$,then the amount of energy absorbed from the reservoir at the lower temperature is (in $J$)

If a refrigerator's door is kept open,will the room become cool or hot? Explain.

In a cold storage,ice melts at the rate of $2 \ kg$ per hour when the external temperature is $20^{\circ} C$. The minimum power output of the motor used to drive the refrigerator which just prevents the ice from melting is (latent heat of fusion of ice $= 80 \ cal \ g^{-1}$) (in $W$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module

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.