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Melting Point

When heat is ...

Question

When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during melting :
(a) increases very slowly
(b) does not increase at all
(c) first remains constant and then increases
(d) increases to form liquid water

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Solution

(b) does not increase at all
During melting, temperature of the ice does not change at all because the heat is used in overcoming the particle-particle attraction forces, which in turn keeps the temperature constant.

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