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Specific Heat Capacity

3.A refrigera...

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3.A refrigerator freezes 5 kg of water at 0^° C into ice at 0^° C in a time interval of 20 minutes. Assume that room temperature is 20^° C. Calculate the minimum power needed to accomplish it?

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Similar questions

Q. A refrigerator freezes

5 k g

0^{o} C

0^{o} C

in a time interval of

20

minutes. Assuming that room temperature is

20^{o} C

. Calculate the minimum power needed to accomplish it?

Q. A refrigerator freezes water at

0^{\circ} C

10 kg

0^{\circ} C

in a time interval of

30 min

. Assuming the room temperature to be

22^{\circ} C

, calculate the minimum amount of power needed to make

10 kg

of ice.
(Take latent heat for freezing as

80 kcal/kg

)

Q. A refrigerator freezes water at

0^{\circ} C

10 kg

0^{\circ} C

in a time interval of

30 min

. Assuming the room temperature to be

22^{\circ} C

, calculate the minimum amount of power needed to make

10 kg

of ice.
(Take latent heat for freezing as

80 kcal/kg

)

Q. A Carnot engine is made to operate as a refrigerator. This refrigerator is used to freeze water at

0^{o}

0^{o}

C and the heat from the working substance is discharged into a large tank containing water at

34^{o}

C. The latent beat of fusion of ice is

334 \times 10^{3} J / k g

. The minimum amount of work required to freeze 3 kg of water is close to

Q. A Carnot refrigerator extracts heat from water at 0

^{\circ}

C and rejects it to a room at 24.4

^{\circ}

C. The work required by the refrigerator for every 1 kg of water converted into ice is
(Latent heat of ice = 336 kj kg

^{- 1}

)

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