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States of matter
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, ↓ Chemical of do ofproperties a substance not
change with the
change it
State; do depend
Physical but rate of chemical reactions upon the physical
State
-
.
2 Intermolecular force doesn't include electrostatic forces and covalent bond
it includes Van der waal's force
London forces :
.
3 London or disperson forces are
attractive
always
.
4 The of London forces is
energy
inversely proportional to
Sixth
power of dist .
blu them .
X1
UG
.
5
These forces are
only important
at short distances (v500pm)
and the magnitude depends on
polarisability of the
particle .
6
.
Dipole -
Dipole forces : ·
Forces act blu molecules posessing permanent dipole .
Dipoles Snow Partial Charge (8)
·
which is less than
one unit of electronic charge (1 .
6x109C)
·
stronger than London force but weaker than ion-ion
interaction .
·
interaction energy b/w 2
Stationary polar molecules
is Xt
X1 ; while for rotating polar molecule is
v6
u3
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