Chemical bonding & Molecular structure

Chemical Bonding 8 Molecular structure



DNLBFN003

, ewis dot structure Net energy transfer =/c- + EH

7?

I: :?


& -4




'
PES OF BONDING

onic bonding .
Hard -
doesn't bend

- 2 atoms with a
large difference in Electro negatiuities (a metal r a non -

metal )
-


Brittle
-
transfer of electrons from metal to non -
metal
-



Rigid cracks without

typically soluble in water
-




covalent
•
2 non -
metals with a low difference in electronegativity (SEN)
•

Sharing of electrons



Metal ic
•
2 metals electron
pooling with metal cores in a sea of delocalised electrons (é )


Couomb's Law
"
-
= 9%2 E = Fxr
"
.
-

.
- =
492 1<=9,09×109 Ii?m


Lattice Energy
change required ionic solid into gaseous ions
energy to 1 moi ol
•
its
separate
can't use coulomb's law to predict Hess 's Law
-
-

. . use


L

tess 's to calculate Lattice
aw
Energy
1h of an for the individual reactions that make it up
overall reaction is the or the
enthalpy changes
-

sum


enthalpy in chemical reaction is in dependant between the initial and final states
a of the
pathway
'
.




Born Haber cycle -




-
the sum of Sh = net 1h