Density of Materials
What is the unit of volume?
m3
Name the three states of matter
Solids, liquids and gases
What is the unit for energy?
Joules (J)
E=?L
Energy = ? x Latent Heat
m
Mass
Can gases be compressed?
Yes.
What is the equation for density?
Desnity = mass / volume
Give the two different names for the change in state from liquid to gas
Boiling / evaporation
What is specific heat capacity?
The amount of energy required to change 1kg of substance by 1oc
What is Specific Latent Heat?
The amount of energy to change the state of a substance without changing its temperature
Name three ways that you can increase the pressure in a sealed container?
1) Put more particles in
2) Put more energy in
3) Decrease the size of the container.
How do you calculate the density of a regular shaped object?
1) Measure mass using mass scale
2) Measure volume using ruler (lxwxh)
3) Divide the mass by volume
Solids
Which has a higher SHC: Copper or water?
Water
What is the difference between the SLH of fusion and vaporisation?
Fusion: solid <--> liquid
Vaporisation: liquid <--> gas
What is pressure?
Particles hitting an object (e.g. the side of a container).
How do you calculate the density of an irregular shaped object?
1) Measure mass using mass scale
2) Measure volume using Eureka can (amount of water displaced=volume)
3) Divide mass by volume
Which state of matter has the most kinetic energy?
Gases
Complete the equation using the symbol change
_______ = ______ x SHC x temperature change
ΔE =mc ΔØ
energy, mass
The SLH of fusion of a substance x is 1000 J/Kg. Its mass is 23kg. How much energy is required to change its state? (include units)
23,000 J
What is the unit for pressure?
Pascals (Pa)
Give the three reasons why some materials are more dense than others
1) Bigger atoms
2) Particles closer together
3) Mass of atoms
What is potential energy?
The energy associated with a system because of its position OR arrangement of particles
What 3 things does the temperature rise depend on?
The mass of liquid being heated The mass of liquid being heatedThe mass of liquid being heated The mass of liquid being heatedThe mass of liquid being heatedThe mass of liquid being heated The mass of liquid being heatedThe mass of liquid being heated The mass of liquid being heated The mass of liquid being heated The mass of liquid being heatedThe mass of liquid being heatedThe mass of liquid being heatedThe mass of liquid being heatedThe mass of liquid being heated
• The type The typeThe typeThe type of liquid being heated liquid being heated liquid being heated liquid being heatedliquid being heatedliquid being heatedliquid being heatedliquid being heated
• The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system.The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system. The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system. The amount of energy input into the system. The amount of energy input into the system. The amount of energy input into the system. The amount of energy input into the system.The amount of energy input into the system.The amount of energy input into the system.
Specific Heat
2500J is needed to change substance y (which has a mass of 7.2kg) from liquid to gas. What is its specific Latent Heat of Vaporisation?
347.22 J/Kg
Complete the equation:
P1 x ? = ? x V2
P1 x V1 = P2 x V2