Multiple Choice
Which compound would you expect to have greater surface tension: acetone (CH_3)_2CO or water H_2O?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
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Which is the strongest type of intermolecular force present in CH3NH2 (methylamine)?
A
Dipole-dipole interactions
B
Hydrogen bonding
C
London dispersion forces
D
Ion-dipole interactions
Verified step by step guidance1
Identify the types of atoms and bonds present in CH3NH2 (methylamine). Note that it contains a nitrogen atom bonded to hydrogen and carbon atoms.
Recall that hydrogen bonding occurs when hydrogen is directly bonded to highly electronegative atoms such as nitrogen (N), oxygen (O), or fluorine (F).
Check if CH3NH2 has N-H bonds, which it does, making hydrogen bonding possible.
Compare hydrogen bonding with other intermolecular forces present: London dispersion forces (weakest), dipole-dipole interactions (moderate strength), and ion-dipole interactions (require ions, which are not present here).
Conclude that the strongest intermolecular force in CH3NH2 is hydrogen bonding due to the presence of N-H bonds enabling strong dipole interactions.
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