C1: Chemicals in the Atmosphere

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  • Created by: nealw2012
  • Created on: 29-02-16 20:07
Definition of Air
The mixture of gases in the atmosphere
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Definition of Atmosphere
The layer of gases that surrounds the earth
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What is the composition of the atmosphere and what do these gases do?
78% Nitrogen; 21% Oxygen; 1% Argon; 0.04%Carbon Dioxide
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What is the effect of diffusion on pollution?
Spreads gases out making them less concentrated and harmful.
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What are the 4 stages in the history of the atmosphere?
1. Temp above 100 degrees-volcanoes release O2 and H20. 2. Rains for 1st time=oceans created. 3. Bacteria in oceans photosythnesise and release 02 into atmosphere. 4. Now-lots of 02 and carbon is locked up in fossils
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How do we measure change in the atmosphere?
1. Iron Pyrate - only if no 02 2. Iron oxide rock - only if no O2 3. Ancient Soils 4. Air bubbles trapped in ice cores
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Name 6 pollutants and there effects, how they are made and chemical formula
Sulfur dioxide, carbon monoxide, carbon dioxide, nitrogen monoxide, nitrogen dioxide, particulates
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What is the acid rain equation and what are the negetive effects of it?
SO2(g)+H2O(l)=H2SO4(aq). Environmental impact (trees), damages buildings, makes lakes acidic.
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Complete combustion equation
C+O2=CO2 enough oxygen
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Incomplete combustion equation and negative effects
3C+O2=2CO+C carbon monoxide-oxygen, particulate, lack of oxygen.
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Balancing fuel equations order
Carbon, Hydrogen, Oxygen
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How are particulates taken out of power station fumes?
Explanation: Negatively sharged, attracted to positive plates
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How are harmful gases neutralised?
Alkaline Slurry - SO2+CaO=Calcium sulfate and harmful gas neutralised.
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What do catalytic converters do?
The contain catalysts which speed up reactions that make chemicals less harmful. 2NO=N2+O2 CO+O2=CO2
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What are the benefits of switching the UK's transport fleet electric?
No direct emissions, less noise, less effects from burning fossil fuels, no biofuels are used which are in small supply
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What are the negatives of switching the UK's transport fleet electric?
Power stations=polutions, short range, expensive, reacharge takes hours.
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Other cards in this set

Card 2

Front

Definition of Atmosphere

Back

The layer of gases that surrounds the earth

Card 3

Front

What is the composition of the atmosphere and what do these gases do?

Back

Preview of the front of card 3

Card 4

Front

What is the effect of diffusion on pollution?

Back

Preview of the front of card 4

Card 5

Front

What are the 4 stages in the history of the atmosphere?

Back

Preview of the front of card 5
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