(a) Some of the useful smaller molecules from cracking are used as
since they release a large amount of heat
on burning. However it is the
which are used in this way as the
burn with a smokey flame and they are a much more
chemical
for making other very useful compounds like
(plastics).
(b)
The hydrocarbon ethene can be reacted with
by passing the mixture over a heated
to make the important chemical compound called
. The product is an important member of a series of organic compounds called
.
(c) This way of making ethanol has the
of being a
industrial process, BUT, the
of using the
resource of crude oil.
(d) Ethanol can be made by the
of sugar, a process that has the
of being based on a
resource, BUT, has the
of being a
process.
(e) This is an example of making a
, in this case bioethanol, which can be blended with
from crude oil to make a range of vehicle fuels.