5.18 Answer

5.18 Answer

07 November 2011

15:08

Collins, p.116

 

 

a.              If we cool the gas in a rigid, sealed tin can, what happens to the pressure inside the can? (1 mark)

The pressure will decrease

 

b.             Explain your answer to part a. by using the Kinetic Theory (4 marks)

·         The volume remains the same because a tin can is a rigid container

·         If the temperature decreases the gas molecules have a lower average Kinetic Energy

·         So there are less collisions between the gas molecules and the walls of the container per second

(NB: Can also say that slower molecules will collide with less force) (1 mark)

·         So the pressure in the container will decrease

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