01:830:123 Lecture Notes - Lecture 5: Eutectic System, Graph Paper
18 Feb 2018
School
Department
Course
Professor
Document Summary
To take notes from the video posted under "media gallery" on the. Sakai course site - video will only be available until 2/5/18. To explain the behavior of impure compounds, use melting point composition diagram. X will start melting and dissolve y in it - making the melting range larger. Solution of x+y has a lower vapor pressure than vapor pressure of pure x which results in a lower melting point. Eutectic temperature - the lowest temperature at which a mixture at a certain concentration will start melting. Definition with regard to melting point composition diagram: Lowest point on melting point composition diagram where a mixture has a very narrow melting range. Definition with regard to two solids and their liquid solutions: Point at which the two solids and their liquid solutions are in equilibrium. Insoluble impurities are poor heat conductors and act just like air pockets. Eutectic point vs. melting point of pure compound:
