Multiple Choice
Which of the following substances has the highest boiling point (at 1 atm)?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces and Physical Properties
Multiple Choice
Which of the following compounds is expected to have the lowest boiling point under the same conditions?
A
(pentylamine)
B
(pentanol)
C
(pentanone)
D
(pentane)
Verified step by step guidance1
Identify the types of intermolecular forces present in each compound, as boiling point is largely influenced by these forces.
For pentylamine (C\_5H\_11NH\_2), recognize that it can form hydrogen bonds due to the -NH\_2 group, which generally increases boiling point.
For pentanol (C\_5H\_11OH), note that it also forms hydrogen bonds because of the -OH group, typically resulting in a higher boiling point than compounds without hydrogen bonding.
For pentanone (C\_5H\_10O), understand that it has a polar carbonyl group (C=O) leading to dipole-dipole interactions but no hydrogen bonding, so its boiling point is usually lower than alcohols and amines but higher than nonpolar compounds.
For pentane (C\_5H\_12), recognize it is a nonpolar hydrocarbon with only London dispersion forces, which are the weakest intermolecular forces among the given compounds, leading to the lowest boiling point.
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