For water, it is 80 cal/g. latent heat of melting The amount of heat energy needed to melt a substance, that is, to change it from a solid to a liquid.
(it; is; 80 cal/g) (heat energy; needed; to melt a substance, that is, to change it from a solid to a liquid)
it heat energy
is needed
80 cal/g
to melt a substance, that is, to change it from a solid to a liquid