∆Hfus
Definition
∆Hfus refers to the heat of fusion, which is the amount of energy required to change a substance from its solid state to its liquid state at its melting point. In other words, it is the heat absorbed or released when a substance undergoes fusion.
Analogy
Imagine you have a bowl of ice cream sitting on your kitchen counter. The ice cream starts melting slowly as it absorbs heat from the surroundings. The energy needed for this phase change is like the amount of heat you would have to add to completely melt the ice cream.
Related terms
Melting Point: The temperature at which a substance changes from its solid state to its liquid state.
Heat Capacity: The amount of heat required to raise the temperature of an object by 1 degree Celsius.
Enthalpy: A measure of the total energy content in a system.
"∆Hfus" appears in:
Practice Questions (5)
Find energy needed to convert 36 g ice to water vapor given the following data about water: ∆Hfus = 334 J/g, ∆Hvap = 2260 J/g.
What's ∆Hfus in J/mol for water given ∆Hfus = 334 J/g, ∆Hvap = 2260 J/g?
How much energy needed to convert 20 g of solid gold to liquid gold given the following information? ∆Hfus = 13.2 kJ/mol, ∆Hvap = 310.9 kJ/mol.
Given the following data about gold: ∆Hfus = 13.2 kJ/mol, ∆Hvap = 310.9 kJ/mol, what would be the enthalpy change when gold transitions from a liquid to a solid phase?
Given the following data about water: ∆Hfus = 334 J/g, ∆Hvap = 2260 J/g. How much energy does the reaction release when converting 36g of liquid water to solid ice?
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