5.13

5.13 Starter

02 November 2011

18:17

·         

How can you fit a giraffe, 2 dogs and a swan into a standard laboratory beaker?!

5.13 Starter 2

02 November 2011

18:17

·         Use particle theory to explain why the gas in the balloon contracts

  

Explanation

·         The temperature of the gas inside the balloon decreases so the average speed of the particles decreases

·         Consequently the gas particles collide with the walls of the balloon with less force and less collisions per second

·         Because the walls of the container are flexible, the  volume decreases

5.13 Charles' law

28 October 2011

11:10

·         5.13 understand that there is an absolute zero of temperature which is –273^oC

	<<Charles' law interactive experiment.swf>>
			Open the Charles' law interactive experiment ·         Adjust the temperature ·         What’s the relationship between temperature and volume? ·         Plot a graph of V against T ·         Take a screen shot of the graph

5.13 results and conclusion

28 October 2011

11:10

Conclusion

·         Volume is directly proportional to absolute (Kelvin) temperature

·         (gas is at constant pressure - flexible container)

·         V Î± T

5.13 Plenary

02 November 2011

19:13

http://phet.colorado.edu/en/simulation/gas-properties

Instructions

·         Keep the Pressure constant (flexible container)

·         Pump some gas particles in

·         Predict what will happen when you heat the gas.  Try it.

·         Predict what will happen when you cool the gas.  Try it.

 

Question

·         What would happen to the volume of the container if you could cool the gas to absolute zero, 0K?

Charles' law interactive experiment.swf Download this file