1. Matter and Change Chapter Two

2. How do we describe matter? Extensive Properties depends on the amount of matter in a sample Intensive Properties depends on the type of matter in a sample Characteristic Properties

3. Identifying Substances What type of properties can we use?

4. Review Question What is the relationship between the state of a substance at room temperature and its boiling point? Room Temperature is 20 °C Gases at Room Temperature (O 2 or N 2 or He) Liquids and Solids at Room Temp. (H 2 O)

5. States of Matter Distinguished by their SHAPE and VOLUME

6. MICRO explains MACRO SolidLiquidGas Fixed Shape or Fluid? Why? Fixed Volume or Compressible? Why?

7. Review Question How are three states of matter involved when a candle burns? Explain what type of changes are involved.

8. Types of Mixtures What are examples of Homogeneous? What are examples of Heterogeneous? What are ways you can separate each type of mixture? What is a substance?

9. Elements, Compounds, Particles, Atoms…

10. Review Question How is a compound different than an element? Can compounds be broken down? Can elements? If so, how? What type of change is this?

11. Chemical Changes THE COMPOSITION or IDENTITY CHANGE How can you tell if the composition of identity change?

12. How are the represented? Chemical Equations REACTANTS  PRODUCTS Important Example - Combustion Reaction REACTANTS  CO 2 + H 2 O

13. Conservation of Mass It is a LAW! Why? MASS of REACTANTS = MASS of PRODUCTS

14. Review Question Hydrogen and oxygen react chemically to form water. H 2 + O 2  H 2 O How much water would be formed if 4.8 grams of hydrogen reacted with 38.4 grams of oxygen?