Why impurities decrease melting points.

  • #1

Main Question or Discussion Point

anyone tell me why melting points of any substance decrease when we add any other material
 

Answers and Replies

  • #2
Mapes
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They don't always; consider http://www.spaceflight.esa.int/impress/text/education/Images/Solidification/PhaseDiagrams/Phase_Diagrams_Image_001.png" [Broken], for example. Do you have a particular system in mind?
 
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