1. Energy (2-4)

2. Energy = power
A. Important in biological systems.
1. Chemical energy
2. Thermal energy
3. Electrical energy
4. Mechanical energy
B. Energy can change – chemical to thermal , to mechanical.
1. Kinetic – energy in motion.
2. Potential – stored energy

3. Three States of Matter
A. Solid = particles tightly packed
B. Liquid = particles free to move in a fixed volume.
C. Gas = particles are free to move randomly
Temperature changes states of matter.

4. A. Things that are needed to start a reaction. (the ingredients)
Reactants
A. Things that are needed to start a reaction. (the ingredients)
Products
A. What is produced from the reactants.
*What is the reactants and products?
C12H22O11 + H2O → C6H12O6 + C6H12O6

5. 5. Energy Transfer
A. Net release of free energy = exergonic reactions
B. Absorption of free energy = endergonic reactions

7. 6. Redox reactions A. Chemical reactions that help transfer energy
B. Reactions in which electrons are transferred are called reduction-oxidation reactions.
1. Oxidation reaction – electron lost.
2. Reduction Reaction – gaining electrons

8. Question…
What type of molecules are being made during Redox reaction?