Crude Oil And Fuels Flashcards
What is an alkane?
A type of hydrocarbon with only single bonds
Alkane are said to be ……… because we …… … any more …….. ….. to them.
1) saturated
2) cannot add
3) hydrogen atoms
What is the general formula of an alkane?
CnH(2n+2)
What happens when the number of carbon increase in alkanes? (2)
1) the chain gets longer
2) the physical properties start to change
Physical properties of alkanes: (4)
1) viscosity increase
2) melting and boiling points
3) volatility decreases
4) how it burns - short chains have a blue flame
- long chains have a dirty flame
Crude oil is a ……. of compounds. Many of these only contain atoms of …… and …….. . They are called ………… . The compounds in crude oil can be speared by using …………. .
1) mixture
2) carbon
3) hydrogen
4) hydrocarbons
5) distillations
What is crude oil?
The separation of a liquid mixture into fractions differing in boiling point by means of distillation, typically using a fractionating column. The different boiling points mean the substance can leave when they hit it.
What are substances called when they contain more than one type of atom?
A compound
What are most of the compound crude oil atoms made of?
Carbon and hydrogen, we call these hydrocarbons
What happens when you heat a liquid?
It evaporates
What happens when you cool a vapour?
It condenses
Evaporating a liquid and condensing it again is called …………
Distillation
Fractional distillation occurs when you separate ….. …
Crude oil
How does the process work? (2)
This process works because the shorter chain molecules have low melting and boiling points and the longer chain molecules have higher melting and boiling points.
What are the products of combustion?
Methane+oxygen—–>carbon dioxide+water
Propane+oxygen->carbon dioxide+water
