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Matter

Matter. Properties and Composition. http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg. So What is Matter?. Anything that occupies space and has mass What isn’t mass? Energy Ideas Sound And…. Properties.

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Matter

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  1. Matter Properties and Composition http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg

  2. So What is Matter? • Anything that occupies space and has mass What isn’t mass? • Energy • Ideas • Sound • And…

  3. Properties • Physical Property - any property that can be observed without transforming the substance into another substance mass, color, freezing point • Chemical Property - any property that cannot be studied without transforming the substance into a different substance iron rusts, paper burns

  4. Properties • Intrinsic – does not depend on the amount of material you have color, solubility, viscosity, malleability, boiling point, density • Extrinsic – depends on the amount of matter mass, volume, length

  5. Density • Property derived from two measurements, mass and volume • Density = Mass/Volume • Will have a unit that contains both mass and volume such as g/cm3, lb/gal, kg/L • Does not depend on the size of the sample

  6. Density • What is the density of a sample of metal that has a mass of 34.58 g and when placed in 15.0 mL of water causes the level to rise to 22.4 mL?

  7. CHM 1010 PGCC Barbara A. Gage

  8. Changes • Physical Change - change that does not transform the substance into another substance melting, subliming, dissolving

  9. Changes • What were the physical changes that you encountered in activities on Day 2?

  10. Changes • Chemical Change -change that transforms the substance into another substance burning, oxidation of metal • http://jchemed.chem.wisc.edu/JCESoft/CCA/pirelli/pages/cca1NaIHgCl2.html

  11. Chemical Change From Silberberg, Principles of Chemistry, 2007 CHM 1010 PGCC Barbara A. Gage

  12. PROBLEM: Decide whether each of the following process is primarily a physical or a chemical change, and explain briefly: Distinguishing Between Physical and Chemical Change (a) Frost forms as the temperature drops on a humid winter night. (b) A cornstalk grows from a seed that is watered and fertilized. (c) Dynamite explodes to form a mixture of gases. (d) Perspiration evaporates when you relax after jogging. (e) A silver fork tarnishes slowly in air. SOLUTION: (a) physical change (b) chemical change (c) chemical change (d) physical change (e) chemical change

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