1. AP Biology

2. Words…What Do You Know? MetabolismCatabolismAnabolism Kinetic Energy Potential Energy Chemical Energy 1 st Law of Thermodynamics 2 nd Law of Thermodynamics EntropyExergonicEndergonic Free Energy Energy Coupling

3. Lets Go Bowling Kinetic Energy Potential Energy

4. Which Happens Spontaneously? Waterfalls Ice melting at room temperature Sugar cube dissolving in coffee Mrs. Ahrens coffee being made instantaneously

5. Spontaneous Increases stability…the unstable want to be stable Example: Spring Which spring is less stable and which is more stable? A B More Less

6. Free Energy Energy (E) available for work but does come at a cost to the system Determines if reaction is spontaneous or not

7. In any spontaneous process, the free E of system decreases Δ G= Δ H – T Δ S For a process to happen spontaneously, system must either: give up E (decrease in H), give up order (and increase in S), or both give up E (decrease in H), give up order (and increase in S), or both Equilibrium…what would Δ G be? Free E

8. Energy In or Out? Δ G is + Δ G is -

9. What is the relationship between the concept of free energy and metabolism?