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Chem Final: Thermodynamics & Hess Law
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Thermodynamics
Changes in
thermal
energy (T = Avg. KE = 1/2
mv^2
)
Enthalpy
(
delta H)
Measurement
of
heat transfer
between
systems
and
surroundings
(
heat movement
)
Entropy (delta S)
Measurement
of how
energy
is
dispersed
within a
system
(
disorder
,
randomness
, or
chaos
)
Gibbs
Free
Energy
(delta
G
)
Energy
that is
available
to do
work
(
spontaneity
or thermodynamics
favorability
)
Hess'
Law
the journey is the
sum
of the
steps
to make it
Catalyst
speeds up
a
reaction
by offering an
alternative
reaction pathway with a
lower activation energy
(instead of A + B -> C,
A + D -> E
then E + B -> C + D)