The heat supplied to a substance during its change of state, does not cause any rise in its temperature.Why?

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Solution

The heat energy supplied to a substance does not raise the temperature of the substance. This heat energy is responsible for affecting the inter molecular forces of the substance and so changes the state.Thus, the temperature of the substance does not change during state change although heat is being applied to it.

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Explain the following :

(a) The surrounding becomes pleasantly warm when water in a lake starts freezing in cold countries.

(b) The heat supplied to a substance during its change of state does not cause any rise in its temperature.

Explain why there is no rise in temperature of a substance when it undergoes a change of state through heat is supplied continuously.

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