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Characteristics of Gases 12.1
Gases are FLUIDS <ul><li>Fluid not liquid </li></ul><ul><li>Fluid because they can flow. </li></ul>
Gases have low density <ul><li>Long distance between particles </li></ul><ul><ul><li>Gas particles have to travel a long d...
Gases are compressible <ul><li>Gas particles can be moved closer together with PRESSURE. </li></ul><ul><ul><li>Increased p...
A gas will completely fill its container. <ul><li>Gas particles are constantly moving. </li></ul><ul><li>Gas particles do ...
Gas Pressure <ul><li>Collisions of gas molecules cause air pressure. </li></ul><ul><li>Atmospheric pressure = the weight o...
http://video.about.com/pediatrics/Ear-Pressure.htm   <ul><ul><li>http://youtu.be/ZNLNeHySon0   </li></ul></ul>
Measuring Pressure <ul><li>Pressure = force/area </li></ul><ul><li>SI unit for force =  newton (N) </li></ul><ul><li>SI un...
STP <ul><li>Standard Temperature and Pressure = 0 0 C and 1 atm. </li></ul><ul><li>Avagadro came up with this to compare g...
Kinetic-Molecular Theory <ul><li>1.  Gas particles are in constant, rapid  motion. </li></ul><ul><li>2.  Gas particles are...
Pressure Conversions… <ul><li>Pressure can be measured in several units. </li></ul><ul><ul><li>psi, torr, pascals, N/m 2 ,...
 
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12.1

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Transcript of "12.1"

  1. 1. Characteristics of Gases 12.1
  2. 2. Gases are FLUIDS <ul><li>Fluid not liquid </li></ul><ul><li>Fluid because they can flow. </li></ul>
  3. 3. Gases have low density <ul><li>Long distance between particles </li></ul><ul><ul><li>Gas particles have to travel a long distance before they collide with each other. </li></ul></ul>
  4. 4. Gases are compressible <ul><li>Gas particles can be moved closer together with PRESSURE. </li></ul><ul><ul><li>Increased pressure = decreased volume </li></ul></ul><ul><ul><li>Decreased pressure = increased volume </li></ul></ul>
  5. 5. A gas will completely fill its container. <ul><li>Gas particles are constantly moving. </li></ul><ul><li>Gas particles do not attract each other. </li></ul>
  6. 6. Gas Pressure <ul><li>Collisions of gas molecules cause air pressure. </li></ul><ul><li>Atmospheric pressure = the weight of the air above you. </li></ul><ul><ul><li>Higher up = less air above = less pressure </li></ul></ul>
  7. 7. http://video.about.com/pediatrics/Ear-Pressure.htm <ul><ul><li>http://youtu.be/ZNLNeHySon0 </li></ul></ul>
  8. 8. Measuring Pressure <ul><li>Pressure = force/area </li></ul><ul><li>SI unit for force = newton (N) </li></ul><ul><li>SI unit for pressure = pascal (Pa) </li></ul><ul><li>Atmospheric pressure is measured with a barometer. </li></ul>
  9. 9. STP <ul><li>Standard Temperature and Pressure = 0 0 C and 1 atm. </li></ul><ul><li>Avagadro came up with this to compare gases. </li></ul><ul><li>http://www.youtube.com/watch?v=13WUqWd_Yk8&feature=related </li></ul>
  10. 10. Kinetic-Molecular Theory <ul><li>1. Gas particles are in constant, rapid motion. </li></ul><ul><li>2. Gas particles are far apart. </li></ul><ul><li>3. Gases are fluids. </li></ul><ul><li>4. Gases can be compressed. </li></ul>
  11. 11. Pressure Conversions… <ul><li>Pressure can be measured in several units. </li></ul><ul><ul><li>psi, torr, pascals, N/m 2 , inches of Hg, mm Hg </li></ul></ul><ul><li>All of the units can be converted to each other. </li></ul><ul><li>The conversion works just like MOL ISLAND. </li></ul>

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