Task: Text Categorization
Input (English): One type of this procedure may use a device called a Kugelrohr (KOO-gehl-roar) and is the ""vacuum"" type. This process utilizes another apparatus that may be named after either Vigreux (vih-GROO) or Liebig (LEE-big). One key principle in this procedure is Raoult's (raw-OOLT's) Law, since it describes the vapor pressure of a solution. A compound on which this procedure cannot be performed is called an azeotrope (AY-zee-oh-trope). For 10 points, name this method of physically separating liquids by boiling.
Output (English): Science