Gaya Antarmolekul, Materi Kelas XI SMA/MA Semester 1

1. Intermolecular
forces
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2. Overview
intramolecular
bonds
attraction in
molecules
intermolecular
forces
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3. Intermolecular forces is much weaker than intramolecular
forces
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4. INTERMOLECULAR FORCES ---- attraction that exist
between molecule
1. GAYA VAN DER WAALS
• GAYA DIPOLE-DIPOLE
• GAYA LONDON (DISPERSI)
2. IKATAN HIDROGEN
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5. 1. Gaya dipole-dipole....dipole-dipole force
2. Gaya london (dispersi)....dispersion force
4. Ikatan hidrogen......hydrogen bonding
5. Ikatan ionik....ionic bonding
6. Jaringan ikatan kovalen.....covalent network
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6. What should be discussed :
1. What ?
2. When?
3. Example?
4. Power?
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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 dipole
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10. polarizability
• the ease with which
an atom or molecule can
be distorted to have
an instantaneous dipole.
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11. Polarizability increases
with: greater number of
electrons
Dispersion forces usually
increase with molar mass.
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12. Effects on boiling points
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13. Dipole-dipole force
• The force that exist between negative and positive ends of a
polar molecule.
• Between two polar molecule
+ -
+ -
Opposite attraction
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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 stronger
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16. Ionic bonding
• The forces holding ions together in ionic solids
are electrostatic forces
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17. •100 % covalent bond
•There are no intermolecular force
•Only compounds of C only (diamond, graphite)
and Si (usually with Oxygen)
• very strong attraction
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20. power
Jaringan ikatan kovalen > Ikatan ionik > Ikatan
hidrogen > dipol-dipol > gaya london
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