We're the Grade 11s in Mr. Doktor's chemistry 11 class.
We're in Block A, Day 1.
We are
Theresa Nguyen
Dominika Skibicki
Charles Perea
Tim Pang
This is our blog.

Intermolecular Bonds

-bonds between molecules

3 types:
1.London Dispersion Force(L.D.F.)
-Results from temporary electron dipoles
-Weakest intermolecular force
-Increases as number electrons increase
-Occurs in any compound that has electrons(i.e.everything)

2.Dipole-Dipole Force
-Results from a permenant dipole in molecules
-Polar molecules experience this force
-Polarity depends how much elements want electrons(electronegativity)
Electronegativity increases right and up
-The strength of a dipole-dipole bond depends on the difference in electronegativity between the 2 atoms

Example:
Substance, Boiling Point, # of electrons
N2, -196 C, 14
O2, -183 C, 16
NO, -152 C, 15
ICl, 97 C, 70
BR2, 59 C, 70

3.Hydrogen Bonds(H-Bonds)
-This is a special type of dipole-dipole bond between H and O, F, N
-Any molecule that has: H-F, H-O, or H-N

Example:
Identify the substances with H-Bonds
1.CH4
2.CH3OH-->H-bonds
3.H2S
4.CH3-NH2-->H-bonds
5.HCl

Compare the Boiling Point of:
Ethanol(C2H5OH-4
Ethane(C2H6)-2
Methanol(CH3OH)-3
Methane(CH4)-1

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