# Specific Heat Capacity And Specific Latent Heat of Fusion/Vaporization

Show/Hide Sub-topics (Thermal Physics | A Level)

The specific heat capacity of a substance is the quantity of heat required to produce a unit change in temperature per unit mass of that substance.

$Q = mc \Delta \theta$

SI unit for specific heat capacity: $J \, Kg^{-1} \, K^{-1}$

The specific latent heat of fusion, $L_{f}$ , is defined as the amount of heat required per unit mass to change a substance from the solid phase to the liquid phase without any change in temperature

$Q = mL_{f}$

The specific latent heat of vaporization, $L_{v}$, is defined as the amount of heat required per unit mass to change a substance from the liquid phase to the vapor phase without any change in temperature.

$Q = mL_{v}$

SI unit for specific latent heat of fusion/vaporization: $J \, Kg^{-1}$