Polarity/Bond Type
What type of bond is between two or more metals.
Metallic Bonds
What type of intermolecular force is present between nonpolar molecules?
Van der Waals (London dispersion) forces
Which property of a liquid increases with stronger intermolecular forces: boiling point or volatility?
Boiling Point
Between CH4 and NH3, which molecule has stronger intermolecular forces?
NH3, because it has hydrogen bonding.
What type of bond is between a metal and a nonmetal? What will the electronegativity difference be between them?
Ionic Bond. 2.0 or more.
What is the strongest type of intermolecular force present in water?
Hydrogen Bonding
True or False: Substances with weak intermolecular forces tend to have lower melting points.
True
Which would have a higher boiling point, HCl or Cl2?
HCl, because it has dipole-dipole interactions, while Cl2 only has London dispersion forces.
What type of bond is between a nonmetal and a nonmetal?
Covalent Bond
Which intermolecular force is present between polar molecules but not involving hydrogen?
Dipole-dipole interactions.
What happens to the viscosity of a liquid as the strength of intermolecular forces increases?
Viscosity increases.
Which substance has a stronger intermolecular force? Explain why.
Substance A: Boiling point 25C
Substance B: Boiling point 5,000C
Substance B has a stronger intermolecular force because more energy is required to "break" it's atoms/molecules apart.
What type of bond is between two nonmetals with an electronegativity difference of 1.5?
Polar Covalent
Rank these intermolecular forces from weakest to strongest: London dispersion, dipole-dipole, hydrogen bonding.
London dispersion, dipole-dipole, hydrogen bonding.
Which type of intermolecular force would you expect to be dominant in a molecule like HCl?
Dipole-dipole interactions.
Arrange the following in order of increasing boiling point: HCl, CH4, NaCl, H2O
CH4, HCl, H2O, NaCl (boiling point increases with stronger bonds/intermolecular forces).
Element A has an electronegativity of 2.4 and Element B has an electronegativity of 2.6. When they bond, what type of bond will they form?
Nonpolar Covalent
Which intermolecular force is responsible for the high boiling point of water?
Hydrogen bonding.
Explain why ionic compounds generally have higher melting points than molecular compounds.
Ionic compounds have strong electrostatic forces of attraction between ions, which require more energy to overcome compared to the intermolecular forces in molecular compounds.
Between CH4 and SO2, which would have stronger intermolecular forces and why?
SO2, because it is polar and exhibits dipole-dipole interactions, whereas CH4 is nonpolar and only has London dispersion forces.