"Molten" redirects here. For other uses, see Molten (disambiguation).
Melting ice cubes illustrate the process of fusion.
Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point. At the melting point, the ordering of ions or molecules in the solid breaks down to a less ordered state, and the solid melts to become a liquid.
Substances in the molten state generally have reduced viscosity as the temperature increases. An exception to this principle is elemental sulfur, whose viscosity increases in the range of 160 °C to 180 °C due to polymerization.[1]
Some organic compounds melt through mesophases, states of partial order between solid and liquid.
^Sofekun, Gabriel O.; Evoy, Erin; Lesage, Kevin L.; Chou, Nancy; Marriott, Robert A. (2018). "The rheology of liquid elemental sulfur across the λ-transition". Journal of Rheology. 62 (2). Society of Rheology: 469–476. Bibcode:2018JRheo..62..469S. doi:10.1122/1.5001523. ISSN 0148-6055.
Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal...
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alloys with a melting point below 183 °C (361 °F; 456 K). Fusible alloys in this sense are used for solder. From a practical view, low-melting alloys can...
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of existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature...
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energy required to convert one mole of solid into liquid. For example, when melting 1 kg of ice (at 0 °C under a wide range of pressures), 333.55 kJ of energy...
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