Peripeteia.

Kawaii nehzxz.
I want t go veejaycee and emjaycee open house :)
I am so sorry God that I couldn't concentrate in service cause I had terrible stomachache which popped out of nowhere :\
Anyway, chemistry is so mind boggling.
I can't seem t remember what are the different causes and effects of the different gases.
Shiaaaaaaaaat man :o

Carbon monoxide (CO)
Comes from the incomplete combustion of carbon-containing substances in the engine such as petrol and diesel in the limited supply og oxygen.
Colourless and odouless gas.
Poisonous as it binds with haemoglobin in the blood and prevents it from carrying oxygen in the blood especially t the heart and lungs. A low concentration of CO can cause death.

Methane (CH4)
Caused by cattle ranching, growing of rice and the bacterial decay of vegetable matter.
Contributes t global warming.

Nitrogen oxides (NO, NO2)
Caused by the presence of high temperatures where nitrogen and oxygen reacts, eg lightning and forest fires. It also takes place in internal combustion in car engines where nitrogen from the air is burnt.
Dissolves in rainwater which produces acid rain that damages limestone buildings and metal structures. Causes irritation and damage t lungs, and damages crops.

Ozone (O3)
The action of uv light on nitrogen oxides and unburnt hydrocarbons. Forms photochemical smog which causes respiratory problems esp asthma attacks, damage crops and burns eyes.

Sulphur dioxide (SO2)
Comes from the combustion of fossil fuels which contain sulphur compounds and from volcanic eruptions. Dissolves in rainwater t form acid rain and destroys crops.

Unburnt hydrocarbons
Internal combustion engines of petrol filled cars. Some may cause cancer, and reacts with nitorgen oxides and sunlight t form ozone.

Placing catalysts in cars
First part of catalyst: Nitrogen oxides react w carbon monoxide t form nitrogen and carbon dioxide when it passes through the catalyst(usually made of platinum).
Second part of catalyst: Air comes in and oxidises with carbon monoxide and unburnt hydrocarbons t form carbon dioxide and water.

Flue gas desulphuriasation(?)
Limestone (CaCO3) is added into hot gases produced from the burning of coal or petrol in power stations. Heat decomposes the limestone where it becomes calcuim oxide.

CaCo3 ---> CaO + Co2

The calcuim oxide reacts with sulphur dioxide to form calcuim sulphide.

CaO + SO2 ---> CaSO3

Limestone is used cause it is cheap.
The calcuim sulphite then reacts with more oxygen t form clacuim sulphate which then is removed from the stations.

Ohmygosh, I hope I can lao lao ji zhu D:
Next time I shall post up eyecandy photos :D
Buhbye.