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MATTER VERSUS ENERGY

Learn about the classification of matter into substances, mixtures, homogeneous, heterogeneous, elements, and compounds. Understand the differences between physical and chemical properties and changes. Explore the states of matter: solid, liquid, and gas.

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MATTER VERSUS ENERGY

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  1. MATTER VERSUS ENERGY • matter: takes up space (volume) and has mass • energy: a force that acts upon matter Are matter (mass) and weight the same? NO

  2. CLASSIFICATION OF MATTER MATTER Substance Mixture Homog. Heterog. Element Compound simplest form of matter; chemically combines to form compounds

  3. CLASSIFICATION OF MATTER MATTER Substance Mixture Homog. Heterog. Element Compound can be separated into simpler substances by chemical rxn

  4. CLASSIFICATION OF MATTER MATTER Substance Mixture Homog. Heterog. Element Compound completely uniform composition – components are evenly distributed (solution)

  5. CLASSIFICATION OF MATTER MATTER Substance Mixture Homog. Heterog. Element Compound not uniform composition – samples are not the same in different areas

  6. STATES OF MATTER • http://legacyweb.chemistry.ohio-state.edu/betha/nealGasLaw/fr1.1.html

  7. STATES OF MATTER: SOLID • definite volume and shape • particles packed closely together • incompressible • low kinetic energy

  8. STATES OF MATTER: LIQUID • can flow; definite volume • takes the shape of a container • particles in close contact • incompressible; can expand upon heating • medium kinetic energy

  9. STATES OF MATTER: GAS • particles take shape and volume of container • particles are far apart • highly compressible • high kinetic energy

  10. PHYSICAL VS CHEMICAL PROPERTIES • PHYSICAL: quality that can be measured without changing its composition • examples: color, solubility, hardness, density, melting and boiling point

  11. PHYSICAL VS CHEMICAL PROPERTIES • CHEMICAL: quality that can be found only by changing the composition of a substance • examples: reactivity, heat of combustion, chemical stability

  12. PHYSICAL CHANGE • change that alters a substance without changing its composition • examples: boil, freeze, dissolve, bend, grind, cut • change of state • reversible

  13. CHEMICAL CHANGE • one or more substances change into new substances • examples: burn, rot, rust, explode, decompose • energy is given off or absorbed • odor or color change • irreversible

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