
Concept explainers
(a)
Interpretation: the intermolecular forces presented in the given molecules
Concept introduction:
- Polarity of a bond is due to the difference in electro-negativities of atoms presented in it. The polarities of bonds are represented by using vectors.
- If the result of all bond polarities or vector sum is non-zero in a molecule, then the molecule is called as polar molecule.
- If the result of all bond polarities or vector sum is zero in a molecule, then the molecule is called as nonpolar molecule.
- Intermolecular force is the set of repulsive and attractive forces between molecules that result from the polarity between neighboring molecules. There are four types of intermolecular forces.
- Dipole – Dipole interaction: This force takes place between polar compounds.
- Hydrogen bonding is a type of dipole-dipole interaction of molecules when the hydrogen is bonded to strong electronegative atom (F, O, N, etc) in the molecules.
- Dispersion force is a weak force and this force is present in all compounds force.
(b)
Interpretation: the intermolecular forces presented in the given molecules
Concept introduction:
- Polarity of a bond is due to the difference in electro-negativities of atoms presented in it. The polarities of bonds are represented by using vectors.
- If the result of all bond polarities or vector sum is non-zero in a molecule, then the molecule is called as polar molecule.
- If the result of all bond polarities or vector sum is zero in a molecule, then the molecule is called as nonpolar molecule.
- Intermolecular force is the set of repulsive and attractive forces between molecules that result from the polarity between neighboring molecules. There are four types of intermolecular forces.
- Dipole – Dipole interaction: This force takes place between polar compounds.
- Hydrogen bonding is a type of dipole-dipole interaction of molecules when the hydrogen is bonded to strong electronegative atom (F, O, N, etc) in the molecules.
- Dispersion force is a weak force and this force is present in all compounds force.
(c)
Interpretation: the intermolecular forces presented in the given molecules
Concept introduction:
- Polarity of a bond is due to the difference in electro-negativities of atoms presented in it. The polarities of bonds are represented by using vectors.
- If the result of all bond polarities or vector sum is non-zero in a molecule, then the molecule is called as polar molecule.
- If the result of all bond polarities or vector sum is zero in a molecule, then the molecule is called as nonpolar molecule.
- Intermolecular force is the set of repulsive and attractive forces between molecules that result from the polarity between neighboring molecules. There are four types of intermolecular forces.
- Dipole – Dipole interaction: This force takes place between polar compounds.
- Hydrogen bonding is a type of dipole-dipole interaction of molecules when the hydrogen is bonded to strong electronegative atom (F, O, N, etc) in the molecules.
- Dispersion force is a weak force and this force is present in all compounds force.
To determine: intermolecular forces presented in
(d)
Interpretation: the intermolecular forces presented in the given molecules
Concept introduction:
- Polarity of a bond is due to the difference in electro-negativities of atoms presented in it. The polarities of bonds are represented by using vectors.
- If the result of all bond polarities or vector sum is non-zero in a molecule, then the molecule is called as polar molecule.
- If the result of all bond polarities or vector sum is zero in a molecule, then the molecule is called as nonpolar molecule.
- Intermolecular force is the set of repulsive and attractive forces between molecules that result from the polarity between neighboring molecules. There are four types of intermolecular forces.
- Dipole – Dipole interaction: This force takes place between polar compounds.
- Hydrogen bonding is a type of dipole-dipole interaction of molecules when the hydrogen is bonded to strong electronegative atom (F, O, N, etc) in the molecules.
- Dispersion force is a weak force and this force is present in all compounds force.

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Chapter 7 Solutions
Chemistry: Atoms First
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