C - Properties And Uses Of Crude Oil Flashcards
All the fractions of crude oil are hydrocarbons called…
Alkanes (with an A!)
Alkanes are made up of chains of ______ atoms surrounded by _______ atoms
Carbon
Hydrogen
Different alkanes have chains of different ______
Lengths
What are the first four alkanes and how many carbon atoms do they have?
- methane - 1
- Ethane - 2
- Propane - 3
- Butane - 4
How many hydrogen atoms does methane have?
4
How many hydrogen atoms does ethane have?
6
What’s the formula to know how many hydrogen atoms an alkane has?
2n+2
n being the amount of carbon atoms
Carbon atoms form __ bonds and hydrogen atoms form __ bond
4
1
If the atom has formed bonds with as many other atoms as they can, it’s means they are …
Saturated
The shorter the molecules the more… they are. (3)
- Runny
- volatile - lower its boiling point
- flammable
The uses of hydrocarbons depend on their …
Properties
Why would bottled gas be good for a camping stove?
The volatility is high - has a low boiling point
Why would petrol be good to put in a car?
A higher boiling point meaning it’s a liquid that can flow the engine
Why are long hydrocarbons used to cover roads?
They are very viscous and gloopy
The hydrocarbons in crude oil are called…
Alkanes
