1. Energy and Chemical Reactions
Bio
Mr. D

2. Chemical Reaction
One or more substances are changed into a new substance by the breaking or forming of chemical bonds.
Involves reactants and products

3. Enzymes Speeds up reactions without being used up.
Catalysts are a type of enzyme
Regulate a cell’s metabolism
Have an active site
Works on only one type of reaction.
Lower activation energy (EA)
The amount of energy required to start a reaction.

4. Types of Reactions Oxidation- Reduction-
Loss of an electron, becomes more positive
Reduction-
Gains an electron, becomes more negative

5. Endothermic Exothermic
Uses heat to perform the reaction (feels “cool” to the touch)
Exothermic
Produces heat in the reaction