C1.2 Flashcards
What is coal mainly made up of?
Carbon
What are hydrocarbons?
Petrol, diesel fuel and oil are made up by them
they are hydrogen and carbon compounds
what happens when fuels burn
Atoms of carbons and hydrogen from fuel combine with oxygen atoms of oxygen from air to produce co2 and water (hydrogen oxide)
what is an oxidation reaction
A substance chemically combining with oxygen
what is a reduction reaction
Loss of oxygen in a reaction
do fuels burn more rapidly in pure oxygen or air
Pure oxygen
why is oxygen obtained from the atmosphere
To support combustion eg in oxy-fuel welding torches
What happens to atoms in a chemical reaction
They are rearranged
In the course of the reaction, what should the number of atoms in the products be to the number of atoms in reactants?
the same, conserving mass
How is sulfur dioxide made when things burn
If a fuel that is burned contains sulfur
What does burning fossil fuels and transport pollute the atmosphere with?
Carbon dioxide and sulfur dioxide
Carbon monoxide
Particulate Carbon
Nitrogen oxides- from the reaction between atmospheric nitrogen and oxygen at high temperatures inside engines
what is the visual representation of an atom
Carbon dioxide =
C-O-C
Where is nitrogen monixide formed
During combustion of fuels in air and is oxidised to nitrogen dioxide
Where do atmospheric pollutants go?
1) particulate Carbon is deposited on surfaces making them dirty
2) sulfur dioxide and nitrogen dioxide react with water to produce acid rain
3) Carbon dioxide is used by plants in photosynthesis
4) Carbon dioxide also dissolves in rain and sea water
