Ch. 2 - Molecular RepresentationsWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins

Solution: For each of the following, choose the best answer; give the letter. (a) Which has the lower heat of combustion: (i) (E)-3-hexene or (ii) 1-hexene?   (b) Which one has the higher heat of combustion: (i) (E)-cyclooctene or (ii) (Z)-cyclooctene?   (c) Which one has the lower boiling point: (i) chloroform or (ii) methylene chloride?   (d) Which one has the higher boiling point: (i) 1,1,1-trifluoroethane or (ii) hexafluoroethane?   (e) Which one is more dense: (i) 1-iodooctane or (ii) 1-bromooctane?   (f) Which one is more dense: (i) water or (ii) 1-iodooctane?   (g) Which one is thermodynamically more stable: (i) 3-methylcyclohexyl cation or (ii) 1-methylcyclohexyl cation?   (h) Which one can be the units of a first-order rate constant: (i) L mol−1 s−1 or (ii) s−1 ?    

Solution: For each of the following, choose the best answer; give the letter. (a) Which has the lower heat of combustion: (i) (E)-3-hexene or (ii) 1-hexene?   (b) Which one has the higher heat of combustion:

Problem

For each of the following, choose the best answer; give the letter.

(a) Which has the lower heat of combustion: (i) (E)-3-hexene or (ii) 1-hexene?

 

(b) Which one has the higher heat of combustion: (i) (E)-cyclooctene or (ii) (Z)-cyclooctene?

 

(c) Which one has the lower boiling point: (i) chloroform or (ii) methylene chloride?

 

(d) Which one has the higher boiling point: (i) 1,1,1-trifluoroethane or (ii) hexafluoroethane?

 

(e) Which one is more dense: (i) 1-iodooctane or (ii) 1-bromooctane?

 

(f) Which one is more dense: (i) water or (ii) 1-iodooctane?

 

(g) Which one is thermodynamically more stable: (i) 3-methylcyclohexyl cation or (ii) 1-methylcyclohexyl cation?

 

(h) Which one can be the units of a first-order rate constant: (i) L mol−1 s−1 or (ii) s−1 ?