P3 Fsl Flashcards
Tell me the particle arrangement in a solid
•The particles are very close together
•Particles are arranged in a regular pattern
•particles vibrate but do not move from place to place
What is the particle arrangement in a liquid
•Particles are close together
•Particles are not arranged in a regular pattern
•Particles can move around each other
What is the particle arrangement in a gas
Particles are very far apart
Particles are not arranged
Particles move very rapidly
What does the density of a material tell us
It tells us the mass of a given volume
Which has more density brick or block of polystyrene
Brick
Why do bricks have high density
It has lots of mass packed in its volume
Why do polystyrene blocks have low density
It has low mass packed into its volume and full of air spaces
How do you calculate density
P=m/v
Why do solids usually have a high density
Because particles are packed together and they have a lot of mass in their volume
Do liquids have a high density and why
Yes. Because the particles are close together and they have a lot of mass in their volume
Why do gases have a low density
The particles are far apart so gases only have a small mass for their volume
How do you find the density of a cube/regular shape
First you find the mass by weighing the cube then you find its volume by multiplying x times y times z then you divide the mass by the volume
What do you do in the method displacement (important!)
First find the mass using a balance
Then fill a eureka can with water
And place the object into the water this will cause the water to be displaced. Flow out of the spout into a measuring cylinder with that find the volume :)
What the Same with liquid gas and solid particles
They all have kinetic energy
What is internal energy
Is the energy stored up in the system by the particles it’s the total kinetic energy and potential of all particles
What are the changes of state from a solid to a liquid
Melting boiling
What are the changes of state from a gas to a solid
Condensation freezing
Are changes of states chemical or physical
Physical
What happens when you melt a solid
It turns into a liquid and the internal energy increases
What is evaporation
The surface turning into gas
What is specific heat capacity
The specific heat capacity of a substance is the amount of energy required to raise the temp
What is the equation for specific heat capacity
Change in thermal energy (J) x mass x specific heat capacity( j/kg) x temperature change
What is specific latent heat of fusion
Energy required to change 1kg of a substance from a solid to a liquid with no change in temp
What is specific latent heat
The amount of energy needed to change the state of one kilogram of the substance with no change in temperature
