1. TOPIC 8 – KINETICS AND EQUILIBRIUM
DO NOW: M.C. QUESTIONS IN PACKET ON KINETCS AND EQUILIBRIUM

2. TOPIC 8 – REGENTS REVIEW Temperature Concentration Nature of Reactants
_Collision Theory states that a reaction is most likely to occur if reactant particles collide with proper energy and orientation
The rate of a chemical reaction depends on several factors:
Temperature
Concentration
Nature of Reactants
Surface Area
Presence of a Catalyst
Pressure (gases only)

3. TOPIC 8 – REGENTS REVIEW
Some chemical and physical changes can reach equilibrium
At equilibrium the rate of the forward reaction equals the rate of reverse
The measurable quantities of reactants and products remain constant at equilibrium
Le Chateliers principle can be used to predict the effect of stress on a system in equilibrium
Stressors include a change in pressure, volume, concentration, and temperature

4. TOPIC 8 – REGENTS REVIEW
Energy absorbed or released by a chemical reaction can be represented by a potential energy diagram
The amount of energy released or absorbed during a chemical reaction is the heat of reaction
Heat of reaction = PE of product - PE of reactant
Positive heat of reaction = endothermic--
Negative heat of reaction = exothermic

5. TOPIC 8 – REGENTS REVIEW
A catalyst provides an alternate pathway for a chemical reaction. The catalyzed reaction required lower activation energy than the uncatalyzed reaction A solution
Adding a catalyst increases the rate of the forward and reverse reactions equally so there is no shift in equilibrium

6. TOPIC 8 – REGENTS REVIEW
Entropy is a measure of the randomness or disorder in a system. A system with greater disorder has greater entropy
System in nature tend to undergo changes toward lower energy and higher entropy
Exothermic reactions that result in increased entropy are spontaneous

7. TOPIC 8 – KINETICS AND EQUILIBRIUM
SUMMARY
ANSWER QUESTION IN PACKET