1. Chemical Reactions

2. Chemical Reactions
Exergonic reaction: chemical reactions that release energy in the form of light, heat or electricity
Example: glow sticks, fireworks, cars burning gasoline, furnace

4. Chemical Reactions
Endergonic reaction: chemical reactions that absorb energy in the form of light, heat or electricity
Example: photosynthesis, digestion

6. Chemical Reactions
Exothermic reaction: a chemical reaction that gives off heat
Examples: burning wood, dynamite, freezing water, condensation, rusting iron, nuclear fission

7. Chemical Reactions
Endothermic reaction: a chemical reaction that needs heat energy to happen
Example: Baking bread, cooking an egg, melting ice, evaporation, Epsom salt in water

9. Chemical Reactions
Catalyst: a substance that speeds up a chemical reaction
The catalyst remains unchanged and does not get used up
Example: enzymes in our bodies

10. Chemical Reactions
Inhibitors: substances that slow down chemical reactions
Examples: food preservatives

11. Chemical Reactions
Factors that influence the rate of chemical reactions:
Temperature
Pressure
Concentration
Catalysts or inhibitors