I. Section 1: Observing Chemical Change A. Properties and Changes of Matter 1) Properties of Matter 2) Changes of Matter 3) Bonding and Chemical Change Chemical changes occur when bonds ___________ and new bonds _________. B. Evidence for Chemical Reactions 1) Changes in Properties precipitate 2) Changes in Energy Endothermic: Exothermic:
II. Section 2: Describing Chemical Reactions A. What are Chemical Equations? 1) When words are replaced by ___________ and chemical formulas to _____________ a reaction 2) Basic structure: ____________ “yield” ___________ B. Conservation of Mass In a chemical reaction, the total mass of the reactants must equal the total mass of the products. symbols summarize reactants products
C. Balancing Chemical Equations the same number of each type of atoms on both sides of the equation! Step 1: Write the equation Step 2: Count the atoms Step 3: Use coefficients to balance atoms Step 4: Look back and check D. Classifying Chemical Reactions 1) Synthesis 2) Decomposition 3) Replacement
III. Section 3: Controlling Chemical Reactions A. Energy and Reactions 1) Activation energy EX: “stars” in fireworks 2) Exothermic and endothermic reactions EX: baking soda & vinegar; baking bread (endothermic) EX: fireworks (exothermic)
B. Rates of Chemical Reactions 1) Surface Area 2) Temperature 3) Concentration 4) Catalysts 5) Inhibitors
IV. Section 4: Fire and Fire Safety A. Understanding Fire 1) The Fire Triangle: 2) Controlling Fire
B. Home Fire Safety If you know how to prevent fires in your home and what to do if a fire starts, you are better prepared to take action. 1) Fighting Fires 2) Preventing Trouble
Chapter Review • Test Format • MC and T/F • Diagrams • Burning a Candle • Balancing a Chemical Reaction • Essays (choose one!) 1) Compare a physical change and a chemical change. 2) Describe the difference between a synthesis reaction and a decomposition reaction.
How to Balance a Chemical Equation Step 1: Write the equation. Step 2: Count the atoms – reactants and products. Step 3: Use coefficients to balance the equation. Step 4: Look back and check.