1In a thermally insulated kitchen, an ordinary refrigerator is turned on and its

Question

1In a thermally insulated kitchen, an ordinary refrigerator is turned on and its door is left open. The temperature of the room: A. remains constant according to the rst law of thermodynamics B. increases according to the rst law of thermodynamics C. decreases according to the rst law of thermodynamics D. remains constant according to the second law of thermodynamics E. increases according to the second law of thermodynamic
How? it is first law of T.D. Isnt refregerator's function based on 2nd law?

An inventor suggests that a house might be heated by using a refrigerator to draw energy as heat from the ground and reject energy as heat into the house. He claims that the energy supplied to the house as heat can exceed the work required to run the refrigerator. This: A. is impossible by rst law B. is impossible by second law C. would only work if the ground and the house were at the same temperature D. is impossible since heat energy ows from the (hot) house to the (cold) ground E. is possible

please EXPLAIN

Explanation / Answer

1.

Result : (B)

Explanation:

According to the first law of thermodynamics , total energy of an isolated system is constant.

Hence if door of refrigerator left open in a thermally insulated room, its temperature will increase to attain the equilibrium.

2.

Result : (E)

Explanation :

According to second law of thermodynamics :

|W|+|QL| = |QH|

QH is the heat supplied to the house.

Hence this is possible that energy supplied to house as heat can exceed the work required to run refrigerator.

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