Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. The internal energy of a substance is increased, typically by the application of heat or pressure, resulting in a rise of its temperature to the melting point, at which the ordering of ionic or molecular entities in the solid breaks down to a less ordered state and the solid liquefies. An object that has melted completely is molten. Substances in the molten state generally have reduced viscosity with elevated temperature; an exception to this maxim is the element sulfur, whose viscosity increases to a point due to polymerization and then decreases with higher temperatures in its molten state.

Some organic compounds melt through mesophases, states of partial order between solid and liquid.

Read more about MeltingThermodynamics of Melting, Melting Criteria, Supercooling, Melting of Amorphous Solids (glasses), Premelting (surface Melting), Related Concepts

Other articles related to "melting":

Melting-point Depression - Particle Shape
... Nanoparticle shape impacts the melting point of a nanoparticle ... Facets, edges and deviations from a perfect sphere all change the magnitude of melting point depression ... Equation 7 gives a general shape corrected formula for the theoretical melting point of a nanoparticle based on its size and shape ...
Melting - Related Concepts
... In genetics, melting DNA means to separate the double-stranded DNA into two single strands by heating or the use of chemical agents, cf ...
Melting-point Depression - Proposed Mechanisms
... The specific melting process for nanoparticles is currently unknown ... accepts several mechanisms as possible models of nanoparticle melting ... of the corresponding models effectively match experimental data for melting of nanoparticles ...
Melting Curve Analysis - Applications
... analysis via SYBR Green, other double-strand specific dyes, or probe-based melting curve analysis has become nearly ubiquitous ... Without probes, amplicon melting (melting and analysis of the entire PCR product) was not generally successful at finding single base variants through melting profiles ... instruments and advanced dyes, amplicon melting analysis of one base variants is now possible with several commercially available instruments ...
Pressure Melting Point
... glaciological literature to refer to the melting point of ice under pressure ... increases in the downward direction, the melting temperature of ice decreases ... This pressure melting point can reach values many degrees below 0°C ...

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