Question

explain why heat energy is needed to melt a solid define latent heat of fusion

Answer 1

Hello!!
Heres ur answer!!
In solids the molecules are tightly packed. So on heating, the molecules gain kinetic energy so the molecules starts vibrating making a distance between them, as a result there state changes to liquid.
The amount of energy required to convert 1 kg of ice to 1 kg of water under 1 atmospheric pressure is known as Latent heat of Fusion.
Hope u liked my answer. Please mark me as brainliest. ...

Answer 2

On heating a solid substance loses its inter-molecular space, the tightly packed particles loses their attraction so that it changes into liquid state. Therefore heat is required.

Latent heat of fusion is the quantity of heat in joules required to convert 1 kilogram of solid into liquid without any change in temperature.