heat of fusion

noun Physics.
the heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature: equal to the heat of solidification.
Compare latent heat.
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American Heritage
Science Dictionary
heat of fusion  
The amount of heat required to convert a solid at its melting point into a liquid without an increase in temperature. Liquids release the same amount of heat when they solidify. See also heat of vaporization.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Most of ice's heat-removing capability comes from its so-called latent heat of fusion.
The latent heat of fusion is treated within the function defining specific heat.
These materials have melting points above room temperature where they would absorb significant energy due to their heat of fusion.
Measurements were also made to determine the triple-point temperature and heat of fusion of a solid sample near its triple point.
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