Pressure Flashcards
Pressure in a gas
Due to the gas particles colliding with the wall of the container the gas is in
What causes an increase pressure in gas?
Increase number of collisions per second
Increase energy of each collision
Methods to increase pressure in gases
Increase temperature
Decrease volume
How does increasing temp increase pressure in a gas?
High temp = higher kinetic energy = more collisions and moves further due to more energy
More collisions = higher pressure
Relationship between pressure and volume in a gas
(At a constant temperature)
The higher the volume, the lower the pressure
High volume = more space
More space = less collisions between the particles and wall as they have more room
Less collisions = lower pressure
Vice versa
Relationship between pressure and volume in a gas
(At a constant temperature)
The higher the volume, the lower the pressure
High volume = more space
More space = less collisions between the particles and wall as they have more room
Less collisions = lower pressure
Vice versa
Density
Amount of mass in a given volume
High density = lot of mass in small volume
Low density = not much mass in big volume
Density equation (kg/m3)
Density = mass (kg)/ volume (m3)
How to remember density equ?
MDV
With m at the top of the equation triangle
How does increasing the temp change the density?
Decreases
Higher temp = more kinetic energy the particles have
= faster the particles move
They are more spread out, therefore they take up more space which decreases density
Features of a solid
Very hard to compress (squeeze) = particles packed together in regular pattern with no space
Fixed shape = particles can’t move from place to place
Features of a solid
Very hard to compress (squeeze) = particles packed together in regular pattern with no space
Fixed shape = particles can’t move from place to place
Liquids
Hard to compress = particles close together with not many spaces between them
Flow = particles can move
Gases
Easy to compress = lots of space between particles
Spread out = particles move quickly and randomly
How to change the state of an object?
Put in (heat) or take away (cool) energy
