17.1
What is a collision model? A collision model explains many characteristics of chemical reactions
17.2
What is activation energy?
A minimum energy needed for a reaction to occur
What are enzymes?
Catalysts inside living organisms
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) + 3H2 = 2NH3 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 envision the reaction taking 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 a reaction to occur. If there is not enough energy a reaction won't occur
5. What is a catalyst? How does a 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 catalyst in living cells called? Why are the biological catalysts necessary?
Catalysts in living cells are called enzymes. They are necessary because they use less heat for reactions
17.4
What is equilibrium?
Equillibrium is the exact balancing of two process, one of which is the opposite of the other
What is chemical equilibrium?
Chemical equilibrium is a dynamic state where the concentrations of all reactants and products remain constant
17.5
Is equilibrium static?
No it is highly dynamic
17.6
What is the law of chemical equilibrium?
A general description of the equilibrium condition
What is equilibrium expression
K= CD/AB
What is equilibrium constant?
Concentrations of the chemical species at equillibrium
