The
formula
of
methane
gas
is
____________________
and
it
is
one
of
the
components
of
natural
gas
,
which
is
up
to
80%
in
it
.
Another
of
the
gases
that
make
up
natural
gas
is
propane
,
whose
combustion
reaction
is
the
following
____________________
C3H8
+
____________________
O2
-
-
-
-
-
>
____________________
CO2
+
____________________
H2O
+
Energy
,
which
is
why
____________________
combustion
is
carried
out
,
characterized
by
a
____________________
flame
.
This
fuel
comes
from
oil
,
but
it
must
be
separated
by
fractional
distillation
in
Refineries
.
Another
of
the
fuels
used
is
heptane
,
which
when
there
is
a
shortage
of
oxygen
,
the
following
reaction
is
carried
out
____________________
C7H16
+
____________________
O2
-
-
-
-
-
>
____________________
CO
+
____________________
H2O
,
observing
a
____________________
flame
,
characterized
by
____________________
combustion
.
Another
example
would
be
the
combustion
of
heptadecane
____________________
C17H36
+
____________________
O2
-
-
-
-
-
>
____________________
C
+
____________________
H2O
,
which
from
the
by
-
products
we
can
see
that
it
is
an
____________________
combustion
and
it
is
evident
that
little
energy
will
emanate
.
Finally
,
chemists
are
investigating
the
use
of
nonane
as
a
fuel
for
internal
combustion
automobiles
and
whose
____________________
combustion
is
____________________
C9H20
+
____________________
O2
-
-
-
-
-
>
____________________
CO2
+
____________________
H2O
,
from
which
a
large
amount
of
energy
is
obtained
.
