17.1 - 17.3 pg 570 2-6

What is a collision model?
A collision model explains many characteristics of chemical reactions
17,2
What is activation energy?
A minumum energy needed for a reaction to occur
What are enzymes?
Catalyst inside your body
17.3
What are homogeneous reactions?
Reactions involving only one phase
What are heterogeneous reactions?
Reactions involving 2 phases
Pg 570 2-6
2. For the reaction N2(g) + 3 H2 (g) = 2 NH3, list the types of bonds that must be broken and the type of bond that must form for the chemical reaction to take place?
Hydrogen bonds must be broken while London Dispersion bonds form
3. How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might invision the reaction raking place
Reactions take place when atoms collide. When one atom hits another a reaction occurs
4. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between the molecules is successful?
The activation energy represents the minimum energy required for reaction to occur. If there is not enough energy a reaction won't occur
5. What is a catalyst? How does catalyst speed up a reaction?
A catalyst is a substance that speeds up a reaction. It speeds up a reaction by lowering the activation energy
6. What are catalysts in living cells called?
Why are the biological catalysts necessary
Catalysts in living cells are called enzymes. They are necessary because the use less heat for reactions