Answered

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A bottle of water at a room temperature of 21.0 C is placed into a refrigerator

with an air temperature of 4.5C. The thermal energy will move — *

A. from the cooler air to lower the temperature of the water to 4.5 C

B. in both directions until the temperature is equal in the water and the air

C. from the water to the air until the water temperature is zero degrees Celsius

O D. from the water to the air until the temperature is equal in both

Sagot :

Answer:

B. in both directions until the temperature is equal in the water and the air

Explanation:

When a warm body is in contact with a cool body , there is exchange of heat energy in both sides until there is attainment of equilibrium temperature . At this temperature both the body attains equal temperature . Initially rate of heat radiated by warm body is more than that from cool body , but after attainment of equilibrium , the rate becomes equal to each other . This is called dynamic equilibrium .

Hence option B is correct .

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