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What does melting point mean?
Melting point, the temperature at which a pure substance's solid and liquid states can coexist in equilibrium. A solid's temperature rises when heat is added to it until it reaches the melting point. The solid will then become a liquid with no change in temperature with the addition of more heat. Additional heat will raise the liquid's temperature once the entire solid has melted. The characteristic number used to distinguish pure compounds and elements is the melting temperature of crystalline solids. The majority of mixes and amorphous materials melt across a wide temperature range.
Because a liquid can freeze in a variety of crystal structures and solids can have varying freezing points, it is widely believed that the melting temperature of a solid and the corresponding liquid are the same.
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