Intermolecular Forces (Gaya Antarmolekul)

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Gaya Antarmolekul, Materi Kelas XI SMA/MA Semester 1

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Intermolecular Forces (Gaya Antarmolekul)

  1. 1. Intermolecular forces13-Nov-12 1
  2. 2. Overview intramolecular bonds attraction in molecules intermolecular forces13-Nov-12 2
  3. 3. Intermolecular forces is much weaker than intramolecular forces13-Nov-12 KARBOHIDRAT 3
  4. 4. INTERMOLECULAR FORCES ---- attraction that exist between molecule 1. GAYA VAN DER WAALS • GAYA DIPOLE-DIPOLE • GAYA LONDON (DISPERSI) 2. IKATAN HIDROGEN13-Nov-12 4
  5. 5. 1. Gaya dipole-dipole....dipole-dipole force2. Gaya london (dispersi)....dispersion force4. Ikatan hidrogen......hydrogen bonding5. Ikatan ionik....ionic bonding6. Jaringan ikatan kovalen.....covalent network13-Nov-12 5
  6. 6. What should be discussed : 1. What ? 2. When? 3. Example? 4. Power?13-Nov-12 6
  7. 7. London dispersion force •The attraction between atoms and molecules caused by the formation of instantaneous atoms in the atoms and molecules •Two non polar molecule •Caused by momentary dipole13-Nov-12 7
  8. 8. 13-Nov-12 KARBOHIDRAT 8
  9. 9. 13-Nov-12 KARBOHIDRAT 9
  10. 10. polarizability• the ease with which an atom or molecule can be distorted to have an instantaneous dipole.13-Nov-12 KARBOHIDRAT 10
  11. 11. Polarizability increases with: greater number of electrons Dispersion forces usually increase with molar mass.13-Nov-12 KARBOHIDRAT 11
  12. 12. Effects on boiling points13-Nov-12 12
  13. 13. Dipole-dipole force• The force that exist between negative and positive ends of a polar molecule.• Between two polar molecule + - + - Opposite attraction13-Nov-12 13
  14. 14. 13-Nov-12 KARBOHIDRAT 14
  15. 15. Hydrogen bonding• A form of dipole attraction in which hydrogen atom bonded to a strongly electronegative atom• H + F, O, N .... HF, NH3, H2O• Works like dipole-dipole but 5 times stronger13-Nov-12 KARBOHIDRAT 15
  16. 16. Ionic bonding• The forces holding ions together in ionic solids are electrostatic forces13-Nov-12 KARBOHIDRAT 16
  17. 17. •100 % covalent bond •There are no intermolecular force •Only compounds of C only (diamond, graphite) and Si (usually with Oxygen) • very strong attraction13-Nov-12 KARBOHIDRAT 17
  18. 18. 13-Nov-12 KARBOHIDRAT 18
  19. 19. 13-Nov-12 KARBOHIDRAT 19
  20. 20. power Jaringan ikatan kovalen > Ikatan ionik > Ikatan hidrogen > dipol-dipol > gaya london13-Nov-12 20

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