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 $W$)

If the coefficient of performance of a refrigerator is $\beta$ and the heat absorbed from the refrigerated space is $Q$,then the work done on the system is:

The freezing compartment of a refrigerator is at $0^{\circ} C$ and the room temperature is $27.3^{\circ} C$. Calculate the work done by the refrigerator to freeze $1 \ g$ of water at $0^{\circ} C$. (Given: $L_{\text{ice}} = 80 \ cal \ g^{-1}$) (in $J$)

Explain the working of refrigerators/heat pumps and their coefficient of performance.

$A$ refrigerator with a coefficient of performance of $1/3$ releases $200 \ J$ of heat. What is the work done on the working substance in Joules?

Can the coefficient of performance of a refrigerator be increased by increasing the mass of the working substance?