t3 test Flashcards
density equation
density = mass / volume
mass, volume, density
kg
m^3
kg/m^3
The internal energy of the air increases as the tyre is
inflated.
explain why
work is done in the
tyre
so the temperature
increases
If the gas is compressed too
quickly the temperature of the gas increases.
Explain how the temperature
increase would affect the
pressure exerted by the gas.
a temperature increase would increase the pressure in the tube
higher temperature
would mean higher kinetic energy of particles
polystryene
solid, low density, very open structure and is full of air spaces
small mass for its volume
specific heat capacity
amount of energy required to raise the temp of 1kg of a substance by 1C
change in energy
Change in energy (J) = mass (kg) x SHC (J/kgC) x change in temperature (C)
specific latent heat
energy needed to change the state of 1kg of a substance
energy equation
Energy (j) = mass (kg) x specific latent heat (J/kg)
specific latent heat of fusion
energy required to change 1kg of a substance from solid to liquid with no change in temp
energy for change of state
= mass x SLH
solids
- particles are very close together
- arranged in a regular pattern
- vibrate but don’t move place to place
- v high density as particles are packed closely, lot of mass for their volume
liquids
- close together
- can move around each other
- high density since particles are close together, lot of mass for their volume
gases
- particles very far apart
- not arranged in any pattern
- in constant random motion
- low density as particles are very far apart so have a small mass for their volume
displacement reaction
- fill a eureka can with water
- place object into water, water becomes displaced and flows out of the can through the spout
- measure the volume of water displaced
- volume is the same as the volume of the object
