Intermolecular Forces Worksheet

IMF – Intermolecular Forces Worksheet Indicate the strongest IMF holding together thousands of molecules of the following. Then indicate what type of bonding is holding the atoms together in one molecule of the following. NOTE – if the molecule is an ionic compound, then there is no IMF, the ions are all held together by ionic bonds. London forces 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. IMF Dipole-dipole forces Hydrogen Bonding Forces Ionic Bonds Bonding Polar Covalent Bonds Nonpolar Covalent Bonds NH3 K2S HCl F2 PCl3 NaCl SO2 CO2 I2 CH4 CH3Cl HF H2O NO H2 CaO O2 CH3OH CO N2 Answer the following questions with dipole dipole forces, H bonding forces, London forces, ion dipole forces, ionic bond, polar covalent bond, or nonpolar covalent bond. 1. What holds molecules of water together? 2. What hold the O and H atoms together in a molecule of water? 3. What holds Na+ and Cl- ions together in salt? 4. What holds NaCl(aq) together in salt water? 5. What holds the two F atoms together in diatomic fluorine? 6. What holds molecules of fluorine together? 7. What holds KBr(aq) together? 8. What holds the C and H atoms together in methane, CH4? 9. What hold methane molecules with each other? 10. What holds the C and O atoms together in carbon monoxide? 11. What holds five molecules of carbon monoxide together? Now let us compare two liquids and their properties. Consider benzene, C6H6, and phenol, C6H5OH: 1. 2. 3. 4. 5. 6. 7. Which has the stronger IMF? Which has the lower vapor pressure? Which has the higher boiling point? Which has the lower viscosity? Which has the higher surface tension? Which one can H bond? Which one has only London dispersion forces? IMF – Intermolecular Forces Key Indicate the strongest IMF holding together several molecules of the following. Then indicate what type of bonding is holding the atoms together in one molecule of the following. NOTE – if the molecule is an ionic compound, then there is no IMF, the ions are all held together by ionic bonds. London forces 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. NH3 K2S HCl F2 PCl3 NaCl SO2 CO2 I2 CH4 CH3Cl HF H2O NO 15. 16. 17. 18. 19. 20. H2 CaO O2 CH3OH CO N2 IMF Dipole-dipole forces Hydrogen Bonding Forces Bonding Polar Covalent Bonds Ionic Bonds Nonpolar Covalent Bonds X X X X X X X X X X X X X X X X X (C-Cl) X X X X X X X X X X X (C-H) X X X X X X X (O-H) X X X (C-H) X Answer the following questions with dipole dipole forces, H bonding forces, London forces, ion dipole forces, ionic bond, polar covalent bond, or nonpolar covalent bond. 1. What holds molecules of water together? H bonding force 2. What hold the O and H atoms together in a molecule of water? Polar cov bonds 3. What holds Na+ and Cl- ions together in salt? Ionic bonds 4. What holds NaCl(aq) together in salt water? Ion dipole force 5. What holds the two F atoms together in diatomic fluorine? Nonpolar cov bond 6. What holds molecules of fluorine together? London force 7. What holds KBr(aq) together? Ion dipole force 8. What holds the C and H atoms together in methane, CH4? Nonpolar cov bond 9. What hold methane molecules with each other? London force 10. What holds the C and O atoms together in carbon monoxide? Polar cov bond 11. What holds five molecules of carbon monoxide together? Dipole dipole force Now let us compare two liquids and their properties. Consider benzene, C6H6, and phenol, C6H5OH: 1. 2. 3. 4. 5. 6. 7. Which has the stronger IMF? phenol Which has the lower vapor pressure? phenol Which has the higher boiling point? phenol Which has the lower viscosity? benzene Which has the higher surface tension? phenol Which one can H bond? phenol Which one has only London dispersion forces? benzene