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Particles In Action

Particles In Action. Lesson 1: Absolute Zero. Learning Objectives: describe the term absolute zero convert between Kelvin and Celsius scales of temperature describe how the temperature of a gas relates to the speed and kinetic energy of its particles

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Particles In Action

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  1. Particles In Action

  2. Lesson 1: Absolute Zero Learning Objectives: • describe the term absolute zero • convert between Kelvin and Celsius scales of temperature • describe how the temperature of a gas relates to the speed and kinetic energy of its particles • recognise that the Kelvin temperature of a gas and the average kinetic energy of its particles are directly proportional.

  3. Starter • Draw the particles in a solution which has been heated and one that is cold.

  4. Kinetic Theory Model • Change your movement according to the volume.

  5. Absolute zero exists at -273oC

  6. http://www.visionlearning.com/library/module_viewer.php?c3=1&mid=48&l=

  7. Celsius to Kelvin? To change 100 °C into Kelvin just add 273. So 100 °C = (100 + 273) K = 373 K. What are the following temperatures in Kelvin? 0 °C, 20 °C, 37 °C, 500 °C, -5 °C, -169 °C

  8. Kelvin to Celsius? To change 100 K into Celsius just subtract 273. So 500 K = (500 - 273) K = 227 °C. What are the following temperatures in Celsius? 0 K, 200 K, 300 K, 1 000 K

  9. Making Thermometers • Fill a bowl with crushed ice. • Put a little coloured dye in the flask, then fill it to the top with crushed ice. Stand it in the bowl with crushed ice and leave it for 15 mins. • Push the rubber bung on, and mark the level of the risen liquid. • Then put the flask into a water bath and leave for 15 mins. • Mark the new level. • Divide the distance between the two marks into 5 equal divisions. Each division will represent 10 degrees. • Leave the flask on the bench for 15 mins, and mark the new level.

  10. How would you describe this relationship?

  11. Summary At __________ (–273 ºC or 0 K) particles __________ moving. You convert ºC to K by adding __________. Increasing the __________ increases the speed of the particles. The _________ in a gas are continually colliding with each other. The kelvin temperature and the average __________ energy of the particles are directly __________ to each other (i.e. double the __________ temperature, __________ the kinetic energy). 273 absolute zero double kelvin kinetic particles proportional stop temperature

  12. Plenary • Explain how we can move from degrees Celsius to degrees Kelvin and back again

  13. Plenary • Explain how we can move from degrees Celsius to degrees Kelvin and back again • Explain why this weather balloon is released when more gas could be added

  14. http://www.chem.ufl.edu/~itl/2045/MH_sims/ideal_nav.swf

  15. Charles Law Simulation http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/gaslaw/charles_law.html

  16. Kinetic Theory Model http://www.practicalphysics.org/go/Experiment_365.html

  17. http://penguincentral.com/pics/gallery/S-131/96ilc31k.jpg

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