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Cards (8)
Solid's key properties:
Very
strong force
of
attraction
Closely packed
and
orderly
Vibrates at its
fixed positions
Has very
low energy
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Key points about the properties of liquids:
Liquids have
strong intermolecular forces
Particles in liquids are
closely packed
and
disorderly
Particles in liquids can
slide
over each other
Liquids have
low energy
compared to
gases
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Gas particles
are
weak
,
far apart
,
disorderly
, and move at
high speeds
in
all directions
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When a
substance
is
heated
,
thermal energy
is
transferred
to its
particles
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Particles
vibrate
and
rotate
about their
fixed position
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>Changes in state of matter:
-temp
of
solid substance increase
till
melting point
(
kinetic
energy
increases
,
vibrate
in
fixed positions
)
-solids
starts to
melt
:
forces
of
attraction
overcome by
motion
of
particles
,
TEMP
REMAINS
CONSTANT
-solids melts completely
:
temp
of
liquid increases
till
b.p
,
line rise
,
kinetic energy
of
particles
in liquid
increases
,particle moves more
quickly
-temp constant
:
forces
of
attraction
overcomed
by
motion
of
particles
,
boiling
occurs
-temp
reaches
gaseous state
,
kinetic energy
in
gas increases
,
particles
move more
quickly.