Boiling point of Alcohols - Boiling Points of Alcohols...

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Boiling Points of Alcohols Observation table: Boiling Points Observations of Substances Chemical Name Carbons Boiling point ( o C) Water (H 2 O (l) ) 0 100 Methane (CH 3 OH (l) ) 1 64 Ethane (C 2 H 5 OH (l) ) 2 77 Isopropyl (C 3 H 7 OH (l) ) 3 80 Pre Lab: Lowest Boiling Point 1. CH 3 OH: One hydrogen bonding, LDF, dipole-dipole - Least amount of covalent bonds, LDF’s 2. C 2 H 5 OH: One hydrogen bonding, LDF, dipole-dipole - Second most covalent bonds, LDF’s 3. C3H7OH: One hydrogen bondings, LDF, dipole-dipole - Most amount of covalent bonds, LDF’s 4. H2O: Two hydrogen bondings, LDF, dipole-dipole Highest Boiling Point Variables: Manipulated : Temperature Controlled : Boiling points of substances Responding : Amount, timing, identical test tubes and room temperature. Reasoning: Hydrogen bonds are the strongest intermolecular forces, therefore, any compound with the most hydrogen bonds will have the highest boiling point. In this case, water has the highest boiling point because it has the highest amount of hydrogen bonds.
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