Melting Point

The melting point of a solid is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends (usually slightly) on pressure and is usually specified at standard pressure. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Because of the ability of some substances to supercool, the freezing point is not considered as a characteristic property of a substance. When the "characteristic freezing point" of a substance is determined, in fact the actual methodology is almost always "the principle of observing the disappearance rather than the formation of ice", that is, the melting point.

Read more about Melting Point:  Examples, Melting Point Measurements, Thermodynamics, Freezing-point Depression, Carnelley’s Rule, Predicting The Melting Point of Substances (Lindemann's Criterion), Open Melting Point Data

Famous quotes containing the words melting and/or point:

    Between melting and freezing
    The soul’s sap quivers.
    —T.S. (Thomas Stearns)

    “What we know, is a point to what we do not know.” Open any recent journal of science, and weigh the problems suggested concerning Light, Heat, Electricity, Magnetism, Physiology, Geology, and judge whether the interest of natural science is likely to be soon exhausted.
    Ralph Waldo Emerson (1803–1882)