How is the fusion used to calculate the energy needed to melt a mass of Solid?

The fusion process is used to calculate the energy needed to melt a solid by applying the formula (Q = m \cdot L_f), where (Q) is the energy required, (m) is the mass of the solid, and (L_f) is the latent heat of fusion for the material. This latent heat represents the amount of energy required to change the solid into a liquid at its melting point without changing its temperature. By multiplying the mass of the solid by its specific latent heat, one can determine the total energy needed for the melting process.