| What is the Difference between Climate Change & Global Warming | Climate Change - Since 4.6 billion years ago
Global Warming - Past 200 years |
| Whats Carbon Footprint | total amount of carbon dioxide (and other greenhouse gases) which are emitted over the full life cycle of a product, service or event |
| Describe the Complete & Incomplete Combustion of Hydrocarbons | COMPLETE: Good oxygen supply, release max amount of energy, produces carbon dioxide & water
INCOMPLETE: Poor oxygen supply, release less energy, produces water, carbon monoxide/carbon or both. Problems:
- Carbon monoxide: poisonous, binds w/ haemoglobin in red blood cell, prevents oxygen carried to cells in body. It's also colourless, has no smell ∴ hard to tell if your breathing it in, detected by electronic detectors (often fitted near boilers)
- Particulate carbon: irritates lung's lining, makes asthma worse, can cause cancer, can cause global dimming, which may reduce rainfall |
| Describe Sulfur Dioxide & Nitrogen as Pollutants | SULFUR: caused when sulfur atoms which are present in some fossil fuels are oxidised (S + O2 → SO2). It is then further oxidised in the atmosphere to sulfur trioxide, SO3. This gas dissolves in rainwater to make acid rain, which is a dilute solution of sulfuric acid, H2SO4(SO3 + H2O → H2SO4)
NITROGEN: high temperatures and pressures inside a car engine can cause nitrogen and oxygen in the air to react together to make oxides of nitrogen, the two which are made inside engines are NO and NO2 grouped together with the general formula NOx which can cause acid rain, they also react in the atmosphere with other pollutants to make photochemical smog. Smog can have major health effects, causing asthma attacks and even death |
