02kjmol0c whataboutthereverseprocesses

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Unformatted text preview: to
 the
standard
atmospheric
pressure
(1
atm).
 •  As
seen
in
the
previous
graph,
the
stronger
the
 intermolecular
a_racUons,
the
higher
the
boiling
 point
of
the
liquid.
 •  A
liquid
with
a
high
boiling
point
has
a
low
vapor
 pressure.
 Chapter
13
 5
 Vapor
Pressure
vs.
Temperature
 •  As
the
temperature
 increases,
the
vapor
 pressure
of
a
liquid
 increases.
 •  The
stronger
the
 intermolecular
 a_racUons,
the
 lower
the
vapor
 pressure
at
a
given
 temperature.
 6
 2
 11/30/10
 Temperature
Effects
on
Vapor
Pressure
 Raising
the
temperature
of
a
liquid
will
increase
the
fracUon
of
molecules
moving
fast
 enough
to
escape
the
liquid
phase
and,
in
general,
increases
the
vapor
pressure.
 Other
Phase
Changes
 Enthalpy
Changes
Accompany
Phase
Changes
 In
a
pure
substance‐
each
phase
change
has
a
specific
enthalpy
change
 per
mole
associated
with
it
(at
1
atm
and
temp.
of
that
change)
 Consider
H2O:
 H2O(l)



















H2O(g)







...
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