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  • A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2)

A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.

Answers (1)

When a hot water tumbler is kept in the freezer, the temperature of the water decreases as it loses energy to the freezer. The decrease in temperature of water goes up to 0°C. The water still loses energy to the refrigerator as its temperature is less than 0°C, but this loss of energy will change the phase of water and it get converted into ice.

 Till the time all water was converted into ice, the temperature remained constant at 0°C.

After the complete formation of ice, the ice will cool down to a lower temperature until it equates to the temperature of the refrigerator.

Hence, the correct graph of temperature is given in option A.

Posted by

Gurleen Kaur

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