Specific latent heat

• The specific latent heat of fusion is the amount of energy needed to melt or freeze one kg of a substance at its melting point.
• the specific latent heat of fusion is the energy required to change the state of 1kg of a substance from solid to liquid or liquid to solid state
• The specific latent heat of vapourisation is the energy required to the change 1kg of a substance from liquid to gas.
• Specific latent heat is calculated by the equation: Thermal energy (J)= mass (kg)x specific latent heat (J/kg)
• Water has a high specific latent heat of vaporization because it takes a lot of energy to break all those hydrogen bonds that hold the molecules together.
• The specific latent heat of sublimation is the energy required to convert 1kg of a substance directly from solid to gas or vice versa.