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Chemistry 1 Question Game,

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Original post by AhmarIT
Outline the process of Fractional Distillation


Crude oil (mixture of hydrocarbons) fed into fractional distillation column.
Heated until evaporation.
Gasses rise up the column and condensate at different levels. The condensated fractions run out of the column out of different pipes.
The column gets cooler as it gets higher up.

Not sure if enough for six marks. :/
Reply 21
Avatar for z_o_e
z_o_e
11
What is independent and dependant variable?

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Original post by get_in_the_robot
Crude oil (mixture of hydrocarbons) fed into fractional distillation column.
Heated until evaporation.
Gasses rise up the column and condensate at different levels. The condensated fractions run out of the column out of different pipes.
The column gets cooler as it gets higher up.

Not sure if enough for six marks. :/



4/6 Im a strict marker :biggrin:
Original post by get_in_the_robot
Crude oil (mixture of hydrocarbons) fed into fractional distillation column.
Heated until evaporation.
Gasses rise up the column and condensate at different levels. The condensated fractions run out of the column out of different pipes.
The column gets cooler as it gets higher up.

Not sure if enough for six marks. :/

The crude oil is heated so it is vapourised.
The hydrocarbon vapor enters the fractionating column
It's cooler at the top and hotter at the bottom
The hydrocarbon that stay as vapor go to the top as they have low boiling points
Some will stay as a gas such a refinery gas whereas ones lower down such as petrol will condense and form a fraction which is then collected
The ones with high boiling points will remain as a liquid and go to the bottom to be collected such as residue. Hydrocarbons have different boiling points depending on the length of their chains.

I think that's 6 marks :smile:
Original post by z_o_e
What is independent and dependant variable?

Posted from TSR Mobile

an independent variable is a variable you change
a dependent variable is the variable you measure
a control variable are all the variables that need to be controlled
Do we need to know about thermosetting and thermosoftening polymers?
Reply 26
Avatar for fauziaa
fauziaa
OP
11
Original post by AhmarIT
Outline the process of Fractional Distillation. (Possible 6 Marker)(Quarrying advantages disadvantages is the other one.)

The crude oil is heated and vaporised. Smaller chain hydrocarbons evaporate to the top whereas larger hydrocarbon remain at bottom. Smaller have low boiling point but are more volatile and highly flammable. Larger have higher boiling point but are less volatile, less flammable and more viscous. The hydrocarbons evaporate and then cool and condense into a liquid when can then be collected. I think thats enough.

What are particulates and what do they cause?
Reply 27
Avatar for fauziaa
fauziaa
OP
11
Original post by get_in_the_robot
Adv: creates jobs, stimulates local economy
Dis adv: dust, noise pollution (from explosions, drilling), increased traffic, unsightly, upsets local ecosystem

QUESTION: explain the properties of different irons and steels.

Not sure what this question is asking me lool but Pure iron is soft so it is blasted in the furnace which created 96% iron and 4% carbon and impurities. Because it is impure, it is brittle and has limited uses. However, can be converted into an alloy by reacting the carbon with oxygen. Alloys are more stronger, corrosion resistant and also depends on the amount of other elements that are mixed with the Iron.

What does Sulfur dioxide and Carbon Dioxide cause?
Original post by fauziaa
Not sure what this question is asking me lool but Pure iron is soft so it is blasted in the furnace which created 96% iron and 4% carbon and impurities. Because it is impure, it is brittle and has limited uses. However, can be converted into an alloy by reacting the carbon with oxygen. Alloys are more stronger, corrosion resistant and also depends on the amount of other elements that are mixed with the Iron.

What does Sulfur dioxide and Carbon Dioxide cause?


Carbon dioxide -> global warming
Sulphur dioxide -> acid rain

What was Wegeners theory and the proof for it?
Reply 29
Avatar for Lxxa14
Lxxa14
17
Original post by fauziaa
The crude oil is heated and vaporised. Smaller chain hydrocarbons evaporate to the top whereas larger hydrocarbon remain at bottom. Smaller have low boiling point but are more volatile and highly flammable. Larger have higher boiling point but are less volatile, less flammable and more viscous. The hydrocarbons evaporate and then cool and condense into a liquid when can then be collected. I think thats enough.

What are particulates and what do they cause?

They are made from carbon due to an incomplete combustion. It is also known as soot. They contribute to global dimming.
Reply 30
Avatar for fauziaa
fauziaa
OP
11
Original post by Jess Shallcross
Carbon dioxide -> global warming
Sulphur dioxide -> acid rain

What was Wegeners theory and the proof for it?


Continental Drift - All the continents were once together and proof he had was they joined together perfectly and fossils that were found.

Why are there many theories about how life was formed on Earth?
Original post by fauziaa
Continental Drift - All the continents were once together and proof he had was they joined together perfectly and fossils that were found.

Why are there many theories about how life was formed on Earth?


NOBODY WAS THERE TO SEE IT.

Explain the process in the blast furnace.
Reply 32
Avatar for Lxxa14
Lxxa14
17
Original post by chrissy666
NOBODY WAS THERE TO SEE IT.

Explain the process in the blast furnace.

Limestone, iron oxide and coke are put in a blast furnace. The product is then reduced and impure iron is formed.

Explain 2 ways copper can be extracted from low grade ores.
Reply 33
Avatar for Flammae
Flammae
5
Original post by lonyeka
Limestone, iron oxide and coke are put in a blast furnace. The product is then reduced and impure iron is formed.

Explain 2 ways copper can be extracted from low grade ores.


Bioleaching an phytoming

How do emulsifiers molecules work?
Original post by lonyeka
Limestone, iron oxide and coke are put in a blast furnace. The product is then reduced and impure iron is formed.

Explain 2 ways copper can be extracted from low grade ores.


I think you should be more precise
carbon + oxygen -> carbon dioxide
carbon dioxide + carbon -> carbon monoxide
carbon monoxide + iron oxide -> iron + carbon dioxide
limestone + impurities -> slag
Original post by Jess Shallcross
Do we need to know about thermosetting and thermosoftening polymers?


That's C2.
Original post by Flammae
Bioleaching an phytoming

How do emulsifiers molecules work?

The hydrophobic tail goes in to the oil droplets. The hydrophilic head goes in the water. The hydrophilic head completely surrounds the oil droplets preventing them from separating or coming back together. This makes the emulsion stable
Original post by SunnyBoys
The crude oil is heated so it is vapourised.
The hydrocarbon vapor enters the fractionating column
It's cooler at the top and hotter at the bottom
The hydrocarbon that stay as vapor go to the top as they have low boiling points
Some will stay as a gas such a refinery gas whereas ones lower down such as petrol will condense and form a fraction which is then collected
The ones with high boiling points will remain as a liquid and go to the bottom to be collected such as residue. Hydrocarbons have different boiling points depending on the length of their chains.

I think that's 6 marks :smile:


Yes!!
Reply 38
Avatar for hafsa23
hafsa23
2
Can someone please explain how you obtain copper through electrolysis!! Would really appreciate it
Anyone able to tell me what we need to know for Miller Urey and polymerisation ?


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