Misc. Flashcards
0
Q
What happens in a blast furnace (8 steps)?
- How is coke burned?
- What does it produce?
- What does this react with?
- What does this product react with?
- How is the iron collected?
- What is the main impurity?
- What is added to remove it and what happens to it?
- What does this react with and what is the product?
A
- Hot air is blasted into the furnace, coke burns faster and temp. Rises to about 1500°C.
- Coke burns to produce carbon dioxide.
- Carbon dioxide reacts with unburnt coke to produce carbon monoxide.
- Carbon monoxide reduces iron ore to iron.
- Molten iron runs to the bottom where it is tapped off.
- The main impurity is solid silicon dioxide, which is removed by limestone.
- The limestone decomposes due to the heat into calcium oxide and carbon dioxide.
- The calcium oxide reacts with the sand to form molten calcium silicate (slag), which is tapped off.
1
Q
Specific heat capacity of water.
A
4.2°C
2
Q
What is slag used for?
A
- Road-building
- Fertiliser
3
Q
How is crude oil separated? (5 steps)
A
- Oil heated so most of it is gas and passed into the fractionating column. Bitumen is drained off.
- Fractions condense at different levels due to their boiling points.
- Longer hydrocarbons condense and drain out first at the bottom.
- Shorter hydrocarbons condense later on higher up.
- Bubble caps stop the fractions from remixing.
4
Q
Use of refinery gases.
A
- Bottled Gas
- Heating
- Pottery and glass manufacturing
5
Q
Use of gasoline.
A
Fuel for cars
6
Q
Use of Naptha
A
Feedstock for plastics, dyes, drugs, explosives, paints.
7
Q
Use of kerosene (paraffin)
A
- Jet engines
- Paint solvent
8
Q
Use of diesel
A
Fuel for Diesel engines in cars, trucks, trains and boats.
9
Q
Use of fuel oil
A
- Domestic central heating.
- Fuel for large ships.
10
Q
Use of bitumen
A
- Road surfacing
- Asphalt for roofs
11
Q
Conditions used for the Haber Process (3)
A
- 200 atmosphere pressure
- 450° C
- Presence of an iron catalyst
12
Q
Use of ammonia
A
- Making nitric acid
- Making ammonium nitrate fertiliser
13
Q
What colour does an a) acid and b) alkali go in phenolphthalein?
A
a) Colourless
b) Bright pink
14
Q
What colour does an a) acid and b) alkali go in methyl orange indicator?
A
a) Red
b) Yellow
