Topic 5 Solids, liquids & gases Flashcards
(31 cards)
Formula for density
Density = Mass/volume
What density a material must be over to sink in water
> 1000kg/m3
Definition of pressure
Concentration of force
Formula for pressure
Pressure = Force/area
What is a fluid
Either a liquid or a gas
When an object is in a fluid, how will the fluid exert pressure on it
Squeezing the object in all directions
At what angle is the pressure applied at in a fluid
90º angle
Formula for pressure in liquids
Pressure = Density x height x gravitational strength
Features of solids (4)
-Particles closely packed
-Vibrate in fixed positions
-Definite shape
-Definite volume
Features of liquids (4)
-Particles closely packed
-They can flow over one another
-No definite shape
-A definite volume
Features of gases (5)
-Particles far apart
-Move randomly
-No definite shape
-No definite volume
-Highly compressible
Whats the change called: Solid to liquid
Melting
Whats the change called: Liquid to gas
Boiling
Whats the change called: Gas to liquid
Condensation
Whats the change called: Liquid to solid
Freezing
Whats the change called: Solid to gas
Sublimation
The higher the temperature the … the kinetic energy
Higher
The amount of the temperature increasing in a specific material depends on the
-Mass
-Type of material
-The amount of energy put in
What is the Specific heat capacity
The energy required to raise a 1kg of a material by 1º
Feature of a substance with low Heat capacity
Heats up and cools down quickly
Feature of a substance with a high Heat capacity
Heats up and cools down slowly
Formula for Change in thermal energy
Mass x Specific heat capacity x Change in temperature (K)
What is Brownian motion
Random motion of particles in a fluid
How is pressure produced
Gas particles collide with the walls of a container; high pressure means high force
