# What is specific latent heat?

Feb 3, 2017

Specific latent heat is the amount of thermal energy absorbed or released during a phase change. Its symbol is L and its units are in J/kg.

#### Explanation:

There are two types:

1. Latent heat of fusion (${L}_{f}$): the amount of thermal energy required to melt or freeze 1kg of a substance.
2. Latent heat of vaporization (${L}_{v}$): the amount of thermal energy required to evaporate or condense 1kg of a substance.

To calculate latent heat:
$Q = L m$