When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P, and when ice at temperature x is warmed, it gets reconverted into water at the same temperature x in a process called Q.
(a) What is the value of temperature x in Kelvin?
(b) What is the process P Known as?
(c) What is the name of energy released during process P?
(d) What is the process Q known as?
(e) What is the name of energy absorbed during process Q?

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Solution

$Water ⇋ Ice$
(a) The temperature at which water converts to ice is 273 K. Therefore, the temperature x is 273 K.

(b) Process P is known as cooling.

(c) Latent heat of freezing is released during the cooling.

(d) Process Q is known as liquifaction.

(e) Latent heat of fusion is absorbed during the reaction.

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