1. Chemical Reactions
6.2

2. Reactants and Products
Chemical reaction- the process by which atoms or groups of atoms in substances are reorganized into different substances.
Chemical bonds are broken down during reactions.

3. Chemical equations There are two parts to a chemical equation
Reactants- the beginning compounds, what is changed
Products- the end compounds, what has been made

4. Energy of Reactions
In order for chemical reactions to take place, they need energy.
Activation energy is the term used for the energy required to make a reaction take place.

5. Energy of Reactions There are two types of reactions that can occur.
Endothermic- retaining energy/ heat
Exothermic- expelling energy/heat
Exothermic
Endothermic

6. Enzymes
Enzymes are a type of protein that speed up the reaction rate in a biological process (make reactions happen faster)
A catalyst is the specific type of enzyme that lowers activation energy to make a reaction happen faster.

7. Enzymes
This catalytic process can be demonstrated by the lock-and-key model.
Reactants are called substrates in this model.
The active site is the specific location where the substrate binds.

8. Key points for 6.2
Chemical reactions have two parts- reactants and products
Reactions need energy to take place
Catalysts lower the amount of energy needed to make a reaction happen