Q

What is the heat per unit mass required to change a substance from solid to liquid at the same temperature and pressure called?

RRB ALP (Stage-II) 22/01/2019 (Shift-I) 2019
✓ Answer: A Latent heat of liquefaction
The source selects A and uses the term 'latent heat of liquefaction'. The standard term for the solid-to-liquid transition is specific latent heat of fusion.