Multiple Choice
Which type of intermolecular force is present in CH_4 (methane)?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
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Which types of intermolecular forces are present between molecules of CO_2?
A
Dipole-dipole forces and London dispersion forces
B
London dispersion forces only
C
Hydrogen bonding and London dispersion forces
D
Ion-dipole forces
Verified step by step guidance1
Step 1: Identify the molecular structure and polarity of CO_2. Carbon dioxide (CO_2) is a linear molecule with two polar C=O bonds arranged symmetrically.
Step 2: Determine the overall molecular polarity. Because the molecule is linear and the bond dipoles are equal and opposite, they cancel out, making CO_2 a nonpolar molecule.
Step 3: Recall that dipole-dipole forces occur between polar molecules, so since CO_2 is nonpolar, dipole-dipole forces are not present.
Step 4: Consider hydrogen bonding. Hydrogen bonding requires a hydrogen atom bonded to highly electronegative atoms like N, O, or F. CO_2 does not have hydrogen atoms, so hydrogen bonding is not possible.
Step 5: Recognize that all molecules exhibit London dispersion forces (induced dipole-induced dipole interactions), which are the only intermolecular forces present in nonpolar molecules like CO_2.
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