Rates of reaction/energy

We're going to revise some of the rates of reaction stuff we've already covered in class, and keep looking at exo/endothermic reactions. Answer the following in your books:

1. What does a catalyst do? Give an example of a biological catalyst from this link:
2. Name the catalyst in this reaction and explain what it does:
3. Why are catalysts important in industrial processes?
4. Watch this animation, and explain how reaction rates can be measured:
5. What does the Haber process produce? What is this product used for?
6. Watch this video on the Haber process. What two things determine what temperature and pressure to carry out the reaction?                                            
7. What is a reversible reaction? What things can influence which way it goes?
8. What is the relationship between pressure and % yield of ammonia? What is the yield at 300 atmospheres?

HOMEWORK
You need to name two other catalysts and explain what reactions they are involved with. This is due on Friday.