heat of fusion
Phase-change energy input
Heat of fusion is the energy required to change a substance from solid to liquid at its melting point, without changing its temperature.
The same quantity of energy is released when the substance freezes.
Water's heat of fusion explains why ice cubes keep a drink cold as they melt—the ice absorbs substantial energy from the liquid.
Solid-to-liquid transition
- solidificationTransition to firm state
- crystallizationForming ordered solid structure
- freezingExtremely cold
- phase transitionMatter shifting between states
liquefaction · thawing · ice · water · solid · liquid · crystal structure · molecular bonds
Thermodynamic total heat quantity
- calorimetryMeasuring heat in reactions
- endothermicAbsorbing thermal energy
- exothermicReleasing energy as heat
- thermochemistryScience of reaction heat
isothermal · isobaric · equilibrium · joules · calories · kilocalories · calorimeter · bond energy
melting
Solid-to-liquid transition
- solidificationTransition to firm state
- crystallizationForming ordered solid structure
- freezingExtremely cold
phase transition · liquefaction · thawing · ice · water · solid · liquid · crystal structure · molecular bonds · freezing point
enthalpy
Thermodynamic total heat quantity
- calorimetryMeasuring heat in reactions
- endothermicAbsorbing thermal energy
- exothermicReleasing energy as heat
thermochemistry · isothermal · isobaric · equilibrium · joules · calories · kilocalories · calorimeter · bond energy
ice
Water's solid form
alloys · glass · chocolate · butter · paraffin · sodium chloride · lead · iron · aluminum · copper