Chem Flashcards
1
Q
What is Crude Oil?
A
A complex mixture of hydrocarbons that was formed over millions of years from the remains of simple marine organisms
2
Q
What is the equation for energy per gram?
A
energy per gram = energy released ÷ mass of fuel burnt
3
Q
Why and how do we crack Hydrocarbons?
A
- By breaking large hydrocarbons into smaller ones by heating heavier fractions to a high temperature in the presence of a catalyst.
- An alkene is also formed
4
Q
What is Polymerisation?
A
- Joining many unsaturated monomers (alkenes) to make a saturated polymer
- one of the bonds of alkenes break to join together to join another
5
Q
What are the uses of poly(ethene)
A
bags, plastic bottles
6
Q
What are the uses of poly(propene)
A
ropes, crates
7
Q
What are the uses of poly(vinylchloride)
A
drain pipes, window frames
8
Q
What are the uses of poly(tetrafluoroethene)
A
non stick pans
9
Q
How do you test for alcohol?
A
The sample is heated with a mixture of potassium dichromate(VI) and sulfuric acid, the mixture changes colour from orange to green if alcohol is present.
