Answer:
Latent heat of fusion of the substance is [tex]6.49\times 10^{4}J/kg[/tex]
Explanation:
Latent heat of fusion denotes amount of energy (heat) per unit mass required to melt a solid material at constant temperature and pressure i.e. at it's melting point
Here amount of heat required = [tex]1.20\times 10^{6}J[/tex]
Mass of unknown substance being melted = 18.5 kg
So, latent heat of fusion of the substance = (required heat energy to melt)/(mass of the unknown substance) = [tex]\frac{1.20\times 10^{6}}{18.5}J/kg=6.49\times 10^{4}J/kg[/tex]
So, latent heat of fusion of the substance is [tex]6.49\times 10^{4}J/kg[/tex]
