This document provides answers to questions about organic chemistry topics including alkenes, alcohols, reactions of alcohols, and factors that affect boiling points. The questions cover naming alkenes and alcohols, drawing structures of reaction products, identifying alcohol types, explaining trends in boiling points, and writing equations for reactions involving alcohols, alkenes, and halogenation.

1. CHEMISTRY 3.5 ANSWERS
WORKSHEET THREE ORGANIC Alkenes & Alcohols
1. (a) hex-2-ene (b) 2-methylpent-2-ene
2. CH3CH2CH2OH Conc. H2SO4 CH3CH=CH2 + H2O
3. Ethanoic acid and propanone
4. (a) Butanol (b) 3-methylbutan-2-ol
5. Tertiary Secondary Secondary
Primary Tertiary Secondary
6. (a) CH3CH(OH)CH2CH3
(b) CH3CH2CH2OH and CH3CH(OH)CH3
(c) CH3CH(OH)CH3
7. (a) Boiling point increases with increasing molecular mass.
(b) The presence of the OH group on propanol allows hydrogen bonding to
occur between propanol molecules. The attractions between propane
molecules are weak Van der Waals forces and so the energy needed to
separate its molecules from each other is much less giving a lower B. Pt.
(c) The OH bond allows the alcohol molecules to hydrogen bond to water
molecules making them soluble. For larger molecules the increasing
alkyl chain makes this less effective.
8. (a) CH3CH2CH2Cl + HCl(g)
(b) PCl3
(c) CH3CH2Cl + SO2(g) + HCl(g)
(d) The product is pure and does not need to be separated from other
products.
9. (a) Catalyst
(b) CH3CH(OH)CH3 ZnCl2/ HCl CH3CHClCH3
(c) Tertiary alcohols react fastest, followed by secondary. Primary are the
slowest.