What everyone needs to know:
Where crude oil is found today, how it was formed and that it is a finite resource. You need to know that crude oil is a mixture of many different organic compounds and it needs to be separated into fractions to be useful. You need to know, describe and explain the process of fractional distillation and the names and uses of a selection of these fractions.
Alkanes and alkenes are examples of hydrocarbons, you need to know the names of the first 4 alkanes and show their formula. e.g. ethane is C2H6.
There are clear patterns between the length of the carbon chain and viscosity, flammability and boiling temperature which you need to know.
Catalytic cracking is a process in which long alkanes and be broken down into smaller alkanes and alkenes. The alkanes can be used in fuels whereas the alkenes are used to make polymers (plastics).
Extra topics needed for the Higher papers:
In this topic, there is nothing extra for the higher papers, the questions will just be more challenging.
What is being taught week by week:
Week 1: How crude oil is formed. Looking into the processes and timescales. We have also looked at the dangers to us, wildlife and the environment of drilling out the oil and transporting it to oil refineries.
Week 2: What is crude oil and making it useful. Finding out how we separate useless crude oil into very useful fractions. We have looked at the properties of individual fractions. Lots of focus on the process of fractional distillation.
Week 3: Combustion. Now we can look into the reactions of both complete and incomplete combustion. Focus on the dangers to life posed by incomplete combustion and how important it is to have fuel appliances regularly serviced and checked as well as having a carbon monoxide detector.
Week 4: Catalytic cracking. The second type of molecule that you meet is the Alkenes. You need to understand how we get more useful fractions from the ones that are more abundant ones. Watch the video about the cracking process. Next week we will look at what we do with these alkenes.