P3: Particle Model Of Matter Flashcards
What is density?
The mass per unit of a volume of a material
Do gases have a definite volume?
Nope
RP: investigating the density of irregular objects (method)
1) place the object on a digital balance and note down its mass
2fill a eureka can with water to below its spout
3)place an empty measuring cylinder below its spout
4) carefully lower the object into the water with a string
6) record the displaced water
RP: investigating the density of irregular objects (errors)
Systematic : digital balance is set to 0 to prevent 0 error
Random: the splash
What is internal energy?
The total energy stored inside a system by the particles that make up the system due to their motion and positions
How does heating affect internal energy?
Increases kinetic store
How does changing state affect internal energy?
Potential energy increases
What is the definition of specific heat capacity?
The amount of energy required to raise the temperature of 1kg of a substance by 1 degree
What is latent heat?
The energy needed for a substance to change state
What is specific latent heat?
The amount of energy required to change the state of 1 kg of a substance with no change in temperature
What is specific latent heat of fusion?
The energy required to convert 1 kg of a substance between a solid and a liquid state with no change in temperature
What is specific latent heat of vaporisation
The energy required to convert 1 kg between a liquid and a gaseous state with no change in temperature
What is the Brownian motion?
The random motion of particles in a fluid
How do molecules exert pressure in a gas?
Through collisions with each other and the walls of the container
Is a gas is compressed/ expanded how is the pressure affected?
Increased / decreased
