Question

When a solid melts it's temperature remains constant. Why ?

Answer 1

when a solid melts its temperature is remain constant because head is used
to changing the solid into liquid by overcoming the Ford of attraction between particles.

Answer 2

When heat energy is supplied to solid it changes into liquid and then to vapor.
If we cool the steam it gets converted into liquid and further cooling of liquid changes it into Solid.

When solid melts, its temperature remains constant because,
The heat energy is used up in changing the state of matter, the heat is used to increase the kinetic energy of the particles of ice to such a limit that they break away from the rigid lattice structure of the solid form, and move around freely to form the liquid form.
So, until all the Solid has melted, the heat absorbed does not raise the temperature of the Solid-liquid mixture. In the same way the temperature doesn't change while a liquid is boiling. This heat, which does not raise the temperature of the body (also called as, LATENT HEAT)


Hope it helped
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