Potentials of Hydrogen Power

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Potentials of Hydrogen Power ( potentials-hydrogen-power )

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Energetic
Electrolysis
 Activity
Guide
 Sciencenter, Ithaca, NY Page 4 www.sciencenter.org We
are
going
to
talk
about
an
exciting
way
to
store
energy
that
is
produced
from
 the
sun,
wind,
coal,
or
any
of
the
other
energy
sources
you
suggested.

This
is
the
 formation
of
hydrogen
gas.


 
 Who
knows
anything
about
using
hydrogen
for
power?

[Participants
may
comment
 on
combustibility,
hydrogen
power,
hydrocars,
etc.]
 
 Hydrogen
is
a
gas
that,
if
stored
and
harnessed
correctly,
can
help
us
power
cars,
 homes,
or
even
computers
in
a
clean,
green
way.

The
technology
to
use
hydrogen
 as
a
power
source
was
first
developed
for
use
on
the
space
station.

In
order
to
get
 hydrogen
gas
we
need
to
separate
water
molecules.

 
 Who
know
the
two
parts
of
water?

[Hydrogen
and
Oxygen,
H2O]
 
 The
chemical
formula
for
water
is
H2O
[Write
this
symbol
down
if
appropriate.]

 Every
water
molecule
includes
two
atoms
of
hydrogen
and
one
atom
of
oxygen.

 We
use
a
process
called
electrolysis
to
break
apart
water
molecules
into
hydrogen
 and
oxygen.

Electrolysis
uses
an
electrical
current
to
split
the
molecule
apart.


 
 In
this
activity
we
are
going
to
split
water
molecules
into
hydrogen
and
oxygen
 gases
using
electrolysis.
 
 In
order
for
electrolysis
to
work
you
need
to
use
the
materials
that
you
have
in
 front
of
you.

[Show
visitors
the
materials.]

Because
we
are
working
with
 electricity,
it
is
very
important
that
you
listen
to
instructions
carefully.


 
 The
battery
provides
the
electrical
current
that
we
need
to
separate
the
water
 molecule
into
hydrogen
and
oxygen.

The
power
that
went
into
manufacturing
or
 producing
this
battery
probably
came
from
a
nonrenewable
resource.

If
the
power
 for
electrolysis
comes
from
a
renewable
resource,
then
hydrogen
power
is
a
very
 clean
energy
source
because
it
does
not
result
in
the
production
of
carbon
dioxide,
 the
main
greenhouse
gas
responsible
for
climate
change.


 
 The
plastic
container
will
hold
the
water
that
we
will
separate.

Salt
(or
sodium
 sulfate)
has
been
added
to
the
water
because
it
conducts
electricity.


 
 Can
you
think
of
a
place
on
Earth
were
we
have
lots
of
salty
water?

[the
ocean]

 Many
people
are
excited
about
hydrogen
power
because
we
can
use
the
hydrogen
 separated
from
ocean
water.



 
 Next
we
need
to
make
electrodes
using
pieces
of
aluminum
foil.

In
order
to
attract
 these
two
parts
of
the
water
molecules
we
must
attach
electrodes
on
the
end
of
 our
power
source,
in
our
case
the
battery.


 
 The
electrodes
carry
the
electrical
current
from
the
battery
to
the
water
and
 hydrogen
gas
is
produced
at
one
electrode
and
oxygen
gas
is
produced
at
the
 other.

[Note
that
oxygen
gas
is
only
produced
if
you
are
using
sodium
sulfate
in
 your
water
solution]


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