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Matter : States of Matter (Gas)

Matter : States of Matter (Gas). 3 States of Matter. Solid Liquid Gas Plasma ***. http://www.chem.purdue.edu/gchelp/liquids/character.html. http://www.pbs.org/wgbh/nova/physics/states-of-matter.html. http://www.middleschoolchemistry.com/multimedia/chapter2/lesson5. Gas.

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Matter : States of Matter (Gas)

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  1. Matter: States of Matter (Gas)

  2. 3 States of Matter • Solid • Liquid • Gas • Plasma *** http://www.chem.purdue.edu/gchelp/liquids/character.html http://www.pbs.org/wgbh/nova/physics/states-of-matter.html http://www.middleschoolchemistry.com/multimedia/chapter2/lesson5

  3. Gas • Takes the shape and volume of the container • Easily compressed

  4. Gas Vs. Vapor • Gas and vapor are often used interchangeably, but there is a difference!!

  5. Gas Vs. Vapor • Gas • Substances that exist in the gaseous state at room temperature. • Vapor • A substance that is currently a gas, but normally is a liquid or solid at room temperature.

  6. Gas Vs. Vapor • Which is correct: “water gas”, or “water vapor”?

  7. Gas • Kinetic refers to motion • Kinetic energy - energy an object has because of it’s motion • Kinetic theory - tiny particles in all forms of matter are in constant motion!

  8. Gas #1. Gas is composed of particles • Small, hard spheres • Insignificant volume; far apart from each other #2. Particles in a gas move rapidly in constant randommotion #3. Collisions are perfectly elastic- meaning K.E. is transferred without loss from one particle to another

  9. Kinetic Energy and Temperature • Kinetic Energy is related to temperature. The faster something is moving, the higher the temperature, the higher the K.E. that particle has. • Please rate the following from least to greatest amount of K.E. • Steam • Water • Ice

  10. Pressure • Gas Pressure– Force (F) of a gas per unit surface area • Due to: • F of collisions • # of collisions • No particles present = no collisions no pressure (a.k.a. vacuum)

  11. Pressure • Atmospheric pressure results from the collisions of air molecules with objects • ↓as you climb a mountain because the air layer thins out as elevation increases

  12. Pressure • The SI unit of pressure is the pascal (Pa) • Other units: • kPa • mm Hg • atmospheres (atm)

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