Question

The amount of heat required to change unit mass of solid into liquid is known as ___________

Answer 1

1. The amount of heat required to change the state of unit mass m of the substance at constant temperature is called the latent heat of a substance
2. The amount of heat required to change a unit mass of solid into liquid is called the specific latent heat of fusion.
3. $Q=mL$, $Q=HeatEnergy,m=mass,L=latentheat$

Hence “ specific latent heat of fusion “ is the correct answer.