객관식
Which type of intermolecular force is present between all substances, regardless of their polarity?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
객관식
Which type of intermolecular force is primarily responsible for the sublimation of dry ice (solid CO_2) at atmospheric pressure?
A
Dipole-dipole interactions
B
Hydrogen bonding
C
London dispersion forces
D
Ionic bonding
검증된 단계별 안내1
Identify the nature of the molecule involved: CO_2 is a linear molecule with two polar C=O bonds arranged symmetrically, making the overall molecule nonpolar.
Recall that nonpolar molecules do not have permanent dipole moments, so dipole-dipole interactions and hydrogen bonding are not significant forces in this case.
Understand that dry ice (solid CO_2) is held together in the solid phase primarily by weak intermolecular forces rather than ionic or covalent bonds between molecules.
Recognize that London dispersion forces (also called induced dipole-induced dipole interactions) are the primary intermolecular forces present in nonpolar molecules like CO_2.
Conclude that the sublimation of dry ice at atmospheric pressure occurs because London dispersion forces are relatively weak, allowing CO_2 molecules to transition directly from solid to gas.
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