Lab2_Prelab

Lab2_Prelab - Chem2545 Fall 07 Pre Lab 2 Homework(50 pts...

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Chem2545, Fall 07 Pre Lab 2 Homework (50 pts total) 1. (a) Look up the boiling points of water, hexane, and 3-methylpentane. Water = 100˚C Hexane = 69˚C 3-methylpentane = 58˚C (b) Rank the boiling points from highest (1) to lowest (3). Water, Hexane, 3-methylpentane (c) Explain the ranking in detail. Note: You can use textbooks or the Internet to find physical properties as long as you provide a reference. Hydrocarbons such as hexane are neutral molecules and possess no permanent dipoles. They have induced dipole-dipole interactions, which represent the strongest interactions among individual hexane molecules. Greater contact areas between molecules produces stronger forces of attraction, due to diminished contact are among individual molecules relative to n-hexane (information taken from Organic Chemistry Lab Book, page 8). 2. Explain how you will use mixed melting point to identify your solid unknown. Mixed melting point is used to determine the identity of a solid with mixed melting
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Lab2_Prelab - Chem2545 Fall 07 Pre Lab 2 Homework(50 pts...

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