[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here's the answer ~
1. The energy that has been given to the solid material is being used to change its phase from solid to liquid.
2. This all energy is converted into latent heat of fusion causing change in state. so there's no increase in temperature.
Answer →
a) The phase of solid material is changing due to Absorption of heat.
b) The energy that is being supplied to it is absorbed by the material to break the intermolecular bonds.
Explanation:
Heat is a mod of transfer of energy, and solid is a giant network of atom or ions closely bounded with high inter molecular forces. When the bonds are formed lead to release in energy hence to break the bond you need to supply energy and that energy supplier is heat. Generally there are two types of heat, one that you sense as rising temperature and another where you see a gradually change in the phase of material. When the heat that you supply is being absorbed that means the energy is being consumed(absorbed) by the material, to break the bonds, and you doesn't sense the temperature of material being raised but the change in state of material from solid→Liquid, solid→gas depends on the type compound, the phase of material changes, same thing happens in reverse case from Gas→Liquid, Liquid→Solid, the energy is released in atmosphere. this absorbed or released energy(heat) is Latent heat.
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