(1)
All
contain
and/or hydrogen and may also contain some sulfur and release large amounts of
on burning which makes them so useful to industrial society, but there is a price to pay!
(2) The general word equation for 'clean'
is
hydrocarbon +
(in air) ===> carbon dioxide + water
Two possible word equations for 'polluting'
are
hydrocarbon +
===>
(soot) + water
hydrocarbon +
===>
+ water
(3) Balance the following symbol equations for ...
... complete combustion of methane: CH
4 +
O
2 ===> CO
2 +
H
2O
... complete combustion of propane: C
3H
8 +
O
2 ===>
CO
2 +
H
2O
... incomplete combustion of methane: CH
4 + O
2 ==> C +
H
2O
... incomplete combustion of methane:
CH
4 +
O
2 ===>
CO +
H
2O
(4) The exhaust/waste gases from motor vehicles or power stations etc. released into the atmosphere when a fuel burns may include ...
... (i)
gas is formed by the
of fossil fuel molecules is a greenhouse gas that contributes to
.
... (ii)
which easily condenses e.g. liquid drops from a car engine exhaust.
... (iii)
, a very poisonous gas, formed by the
of a hydrocarbon fuel. This gas reduces the capacity of blood to carry
. It is formed in car engines and faulty gas appliances.
... (iv)
which causes acid rain.
(5)
Solid black particles of
(mainly carbon) may also be released by the
of fossil fuels.
(6) Sulfur can be removed from fuels from crude oil before they are
, and this reduces the amount of the acidic gas
that is released into the environment on combustion.
(7) In power stations sulfur dioxide can be removed from the
after combustion by passing the smoke through an
to absorb and
the acidic gas.