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Ch.12 - Liquids, Solids & Intermolecular Forces
Tro - Chemistry: A Molecular Approach 6th Edition
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Tutti i libri di testoTro 6th EditionCh.12 - Liquids, Solids & Intermolecular ForcesProblema 42c
Capitolo 12, Problema 42c

Determine the kinds of intermolecular forces that are present in each element or compound. c. CCl4

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Identify the molecular structure of CCl_4. It is a tetrahedral molecule with carbon at the center and four chlorine atoms at the corners.
Determine the polarity of the C-Cl bond. The bond is polar due to the difference in electronegativity between carbon and chlorine.
Assess the overall polarity of the CCl_4 molecule. Despite having polar bonds, the molecule is nonpolar because the dipoles cancel out due to its symmetrical shape.
Identify the types of intermolecular forces present. Since CCl_4 is nonpolar, the primary intermolecular force is London dispersion forces.
Conclude that CCl_4 exhibits London dispersion forces, which are present in all molecules, especially nonpolar ones like CCl_4.

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Intermolecular Forces

Intermolecular forces are the attractive forces between molecules that influence physical properties such as boiling and melting points. These forces include hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Understanding these forces is crucial for predicting the behavior of substances in different states of matter.
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Intermolecular vs Intramolecular Forces

Molecular Polarity

Molecular polarity refers to the distribution of electrical charge across a molecule, which determines whether it has a positive or negative end. Polar molecules have a significant difference in electronegativity between atoms, leading to dipole moments. In contrast, nonpolar molecules, like CCl4, have symmetrical arrangements that cancel out dipoles, resulting in no overall polarity.
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Molecular Polarity

CCl4 Structure and Properties

Carbon tetrachloride (CCl4) is a tetrahedral molecule with four chlorine atoms symmetrically arranged around a central carbon atom. This symmetry leads to a nonpolar character, meaning the only intermolecular forces present are London dispersion forces. Understanding the molecular structure helps in predicting its physical properties and behavior in various chemical contexts.
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Physical Properties
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