Particle model Flashcards
Does solids have strong or weak forces of attraction between the particles
Yes
this is what holds them in a fixed position
Does solid have a definite shape and volume
Yes because of how compact they are and strong forces
Can solid particles move around
No they can only vibrate int hair fixed position
What does heating up a solid do
Particles gain more kinetic energy
vibrates more
weakens the forces of attraction
therefore they are more easily overcome and broken
so lowers boiling point
Does liquid have weak or strong forces of attraction
Weak
Are liquid particles free to move
Yes
Liquids are arranged randomly but still touching
They have a fixed and definite volume even though the shape can change
What does liquids do to fill container
flows
Are the forces of attraction in gas weak
Yes VERY WEAK
easy to break
therefore free to move around randomly and freely
as they do not have a definite shape or volume
Do gases always fill container
Yes
What happens when you heat a gas
Increases pressure
more kinetic energy
collide with the walls more often
what are some disadvantages about the particle model
does not contain details about the forces between the particles
simplified model as particles aren’t actually solid spheres
what’s the equation for density
mass / volume
how do you calculate density with a regular shaped solid
get the mass by measuring it on a balence
measure length width and height with a ruler
find out volume by doing length x width x height
work out density from equation density= mass/ volume
how do you work out density from an irregular shape (hint, eureka can)
Get a eureka can and fill it with water to the top
Get a measuring cylinder
measure solid on weighing balence
Add the solid to the eureka can
Measure the amount of water displaced to find the volume
Then calculate density from density = mass/ volume
what’s the equation for pressure
pressure = force / area
What is pressure measured in
Pa
What does collision of 2 objects/ particles with the walls generate
generates pressure
and force in each direction
what is fluid pressure
when particles collide with the walls of the container and the air at the surface
what is perpendicular force
component of the force which is at right angles to the surface it’s colliding with
does à perpendicular force generate more pressure than a force at an angle
yes as it’s entire force creates the pressure
How do you change kPa into Pa
x 1000
