Question

why heat energy needed to meat a solid? what is this heat energy called ​

Answer 1

Heat energy is needed to overcome the force of attraction between the particles of solid so that it can be converted into liquid state.

The heat is called latent heat of fusion as it gets hidden in the beaker's content and the material doesn't show any rise in temperature.

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Answer 2

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Explanation:

LATENT HEAT

Heat is a form of energy.

In Thermodynamic, The change in internal energy of a closed system is equal to the amount of heat applied minus the amount of work done by the system.

And is represented by : ∆ U = Q - W