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2. In ordering boiling points, you would likely state, correctly, that, given constant carbon chain length, alkanes have the lowest boiling point, with amines a little higher, and alcohols much higher still. Considering that, for constant R-group, amines and alcohols have pretty much the same molar mass, then why should alcohols, with their O, have higher boiling pints than amines, with their N? Just using class discussions, what is different between them such that their physical properties are so different?

2. In ordering boiling points, you would likely state, correctly, that, given constant carbon chain length, alkanes have the lowest boiling point, with amines a little higher, and alcohols much higher still. Considering that, for constant R-group, amines and alcohols have pretty much the same molar mass, then why should alcohols, with their O, have higher boiling pints than amines, with their N? Just using class discussions, what is different between them such that their physical properties are so different?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Understanding Boiling Points of Alkanes, Amines, and Alcohols** In examining the order of boiling points, it's accurate to state that, given a constant carbon chain length, alkanes have the lowest boiling points. Amines have slightly higher boiling points, and alcohols have much higher boiling points. Given that amines and alcohols with a constant R-group have approximately the same molar mass, why is it that alcohols, containing oxygen (O), have higher boiling points than amines, which contain nitrogen (N)? Drawing from class discussions, explore the differences in their structures and intermolecular interactions that result in their varied physical properties. **Key Points to Consider:** - **Hydrogen Bonding Capability:** Alcohols can form stronger hydrogen bonds due to the highly electronegative oxygen atom, resulting in higher boiling points. - **Molecular Polarity:** Differences in electronegativity between O and N also contribute to variations in polarity and intermolecular forces. - **Structure and Bonding:** Explore how the structural differences between these groups influence their boiling points. This knowledge aids in understanding the unique behaviors of these compounds in various chemical contexts.
Transcribed Image Text:**Understanding Boiling Points of Alkanes, Amines, and Alcohols** In examining the order of boiling points, it's accurate to state that, given a constant carbon chain length, alkanes have the lowest boiling points. Amines have slightly higher boiling points, and alcohols have much higher boiling points. Given that amines and alcohols with a constant R-group have approximately the same molar mass, why is it that alcohols, containing oxygen (O), have higher boiling points than amines, which contain nitrogen (N)? Drawing from class discussions, explore the differences in their structures and intermolecular interactions that result in their varied physical properties. **Key Points to Consider:** - **Hydrogen Bonding Capability:** Alcohols can form stronger hydrogen bonds due to the highly electronegative oxygen atom, resulting in higher boiling points. - **Molecular Polarity:** Differences in electronegativity between O and N also contribute to variations in polarity and intermolecular forces. - **Structure and Bonding:** Explore how the structural differences between these groups influence their boiling points. This knowledge aids in understanding the unique behaviors of these compounds in various chemical contexts.
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Alcohols are the compounds having -OH as a functional group. Amines are the compound having -NH2 as a functional group.

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