As there are two boundaries, solid/liquid and liquid/gas, each material has two specific latent heats: Specific latent heat of fusion (kJ/kg) 22.4 Specific latent heat of vaporisation (kJ/kg ...

so the latent heat of vaporisation for a substance is usually greater than its latent heat of fusion. The table shows some typical values: Substance Specific latent heat of fusion (kJ/kg ...