## Specific Latent Heat

**Specific latent heat** is the **energy **needed to change the state of a substance.

## What is Specific latent heat?

**Specific latent heat** is the **energy** needed to change the state of a substance. **Latent heat** is the **energy** absorbed or released by a substance during a change in its physical state. The **latent heat** is normally shown as the amount of **heat** **energy** in** joules** per **Kg mass** of the substance undergoing the change of state.

## Specific latent heat equation

To calculate **Specific latent heat** we use this equation.

$E = {\text{m} \text{L}}$

## Specific latent heat demo

In this tutorial you will learn how to calculate the **energy** needed for different substances to change their state of matter.

## Chilled practice question

The **specific latent heat** of water for melting is 334000 **J/Kg**. How much **heat energy** needed to melt a 30 **Kg** block of ice ?

## Frozen practice question

What is the **specific latent heat** of a material if 2 **Kg** of the material releases 95.5 **KJ** of energy when it melts ?

## Science in context

**Specific latent heat** is the **energy** needed to change the state of matter a substance.

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