pressure in gases

Question 1

what can pressure changes do to a gas?

Answer 1

compress or expand it

Question 2

what does pressure produce?

Answer 2

a net force at right angles to the wall of the gas container

Question 3

equation

Answer 3

pV = constant

Question 4

explain how increasing the volume in which a gas is contained, at constant temperature, can lead to a decrease in pressure

Answer 4

• increasing volume means the particles spread out more
• so they hit the container walls less often
• so less collisions with it
• so less force exerted
• so a decrease in pressure

Question 5

how can a change in pressure cause a change in volume?

Answer 5

• pressure of a gas causes a net outwards force at right angles to the surface of its container
• also a force on the outside of the container due to the pressure of the gas around it
• if a container can easily change its size, than a change in pressures will cause container to compress or expand due to the overall force