> Questions
· Why does the needle on the meter move when gas particles are introduced into the box?
· What does the meter measure? Answers
· The gas particles collide with all of the walls of the container. The wall on the right moves outwards and moves the needle.
· Pressure. The gas particles colliding with the walls makes a force on the walls. The walls have a surface area so the quantity measured is pressure, p=F/A. 5.12+5.15 Questions 02 November 2011 15:55
· 5.12 recall that molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container
· 5.15 understand that an increase in temperature results in an increase in the speed of gas molecules
[cid:image001.png@01CC9986.E18EA0B0] Try the animation http://www.lon-capa.org/~mmp/kap10/cd283.htm
1. How do the particles create a pressure? - By reacting with the surroundings and colliding.
2. If you increase the temperature, how does the movement of the particles change? - They will get faster.
3. If you increase the temperature, how does the number of collisions per second change? - It will Increase.
4. If you increase the temperature, what does this do to the pressure? - Increases the pressure.
> 
· Why does the needle on the meter move when gas particles are introduced into the box?
· What does the meter measure? Answers
· The gas particles collide with all of the walls of the container. The wall on the right moves outwards and moves the needle.
· Pressure. The gas particles colliding with the walls makes a force on the walls. The walls have a surface area so the quantity measured is pressure, p=F/A. 5.12+5.15 Questions 02 November 2011 15:55
· 5.12 recall that molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container
· 5.15 understand that an increase in temperature results in an increase in the speed of gas molecules
[cid:image001.png@01CC9986.E18EA0B0] Try the animation http://www.lon-capa.org/~mmp/kap10/cd283.htm
1. How do the particles create a pressure? - By reacting with the surroundings and colliding.
2. If you increase the temperature, how does the movement of the particles change? - They will get faster.
3. If you increase the temperature, how does the number of collisions per second change? - It will Increase.
4. If you increase the temperature, what does this do to the pressure? - Increases the pressure.
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