Question

5. Explain the following
(a) Temperature remains constant during melting of ice.
(b) Evaporation is a surface phenomenon.​

Answer 1

Answer:

1.The temperature of any substance remain constant during the change of state because the heat energy supplied is used up in changing the state of matter and also this heat is used for breaking of several bonds or attractive forces. ... When heat energy is supplied to ice it changes into water and then to vapor.

Explanation:

2.Evaporation is a surface phenomenon because, during evaporation, the molecules with higher kinetic energy dissipate into the air from the topmost layer of the liquid so it is a surface phenomenon. ... Therefore, evaporation takes place from the surface but not from the inside.

Answer 2

Explanation:

1. temperature remains constant during meeting of ice because even though heat supplied continuously because the temperature is supplied for changing the state of matter not for increasing the temperature.

2.

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