# What is specific latent heat?

##### 1 Answer

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:

- Latent heat of fusion (
#L_f# ): the amount of thermal energy required to melt or freeze 1kg of a substance. - Latent heat of vaporization (
#L_v# ): the amount of thermal energy required to evaporate or condense 1kg of a substance.

To calculate latent heat: