Question

Define melting point and latent heat of fusion. (a) Why does the temperature remain constant during melting of ice even though heat is supplied continuously? (b) A doctor advises to use ice pad on forehead to bring high fever down instead of using water at 0° C . Why ? (c) How melting point of a substance indicates the strength of its inter molecular force of attraction?

Answer 1

Hi friend
here is ur answer
melting point :the process in which solid phase changes to liquid phase at aconstant temperature is called melting point
this process takes place at a constant temperature0° c or 273k
latent her of fusion: the heat energy required to convert 1 gm of solid completely into liquid art a constant temperature is called latent heat of fusion
a) the heat energy supplied to the ice increase the initial energy of the molecules of the ice . this increase in internal energy of molecules weakness the bonds as well as breaks the bonds between the molecules in the ice that is why the ice becomes water
b) because the heat in our body will be transferred to the ice pack and the cold in the ice pack transferred to the body hence the body cool and reduce the fever
c)by specific heat
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