1. Chapter 6 Endothermic and Exothermic Reactions Enzymes – Part 1

2. Exothermic Reaction

3. Endothermic Reaction

5. Activation energy – Energy needed to start a chemical reaction Transition state Reactants Progress of the reaction Products  G  0 Free energy EAEA

6. Catalyst – Speeds up chemical reactions by lowering the activation energy.

7. Figure 6.13 Products  G is unaffected by enzyme Reactants Progress of the reaction Free energy E A with enzyme is lower E A without enzyme Course of reaction without enzyme Course of reaction with enzyme