Enter the mass of substance that was change to a liquid state and the total heat required to determine the heat of fusion.
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Heat of Fusion Formula
The following formula is used to calculate a heat of fusion.
Hf = q / m
- Where Hf is the heat of fusion (J/g)
- q is the total heat required to melt the solid (J)
- m is the total mass of the material that was melted (g)
Heat of Fusion Definition
A heat of fusion is defined as the total energy per unit mass required in order to turn a solid into a liquid of a given material.
Heat of Fusion Example
How to calculate heat of fusion?
- First, determine the total mass of solid that was melted.
For this example the mass of the solid was determined to be 50g.
- Next, determine the total heat required to melt the solid.
After an experiment to melt the solid, it’s determined that the total heat added to the solid was 4000J.
- Finally, calculate the heat of fusion.
Using the formula we find the heat of fusion to be 4000J/50g = 80J/g.
Heat of fusion is a measure of the amount of energy per unit mass that is required to melt a solid and turn it into a liquid.