P1.2 Flashcards
What is the formula for density?
Mass / volume
What is 1m cubed in cm cubed
100,000cm cubed (1 x 10^6)
What are the units for density?
Kg/m^3
What is 0 degrees Celsius in kelvin?
273 degrees Kelvin
What is 0 degrees kelvin?
The point at which particles don’t move at all
Estimate the volume of water in a cup
250cm^3
What is specific heat capacity?
The heat energy required to raise the temperature of 1kg of a substance by 1 kelvin
What are the units for specific heat capacity?
J/KgK - Joules per Kilogram Kelvin
What is the equation for specific heat capacity?
Energy supplied = mass of substance x specific heat capacity x temperature change
What does a lower specific heat capacity mean for temperature change?
It is easier to increase the temperature
What is latent heat of vaporisation?
The amount of heat needed to change 1kg of a liquid to a gas
What is the specific heat capacity of water?
4180J/kg degrees Celsius
What are the units for specific heat capacity?
J/Kg joules per kilogram degrees Celsius
How many joules are in a megajoule (mj)?
1million
How many joules are in a kilojoule (kj)?
1000
What is the specific heat capacity of oil?
1500j/kg degrees Celsius
What is the specific heat capacity of concrete?
880j/kg degrees Celsius
What is the specific heat capacity of copper?
330j/kg degrees Celsius
What is the specific heat capacity of aluminium?
913 j/kg degrees Celsius
What is the action to solid to gas
Sublimation
What is the act of gas to solid?
Depositing
What is the latent what of fusion (or melting)?
The energy transferred when 1kg of a substance changes from a solid to a liquid or from a liquid to a solid.
What do you calculate with specific latent heat?
Thermal energy required for a change in state (J) = mass (Kg) x specific latent heat (J/Kg)
What is the specific latent heat of fusion for water?
334000
What is the specific latent heat of fusion for lead?
24500
What is the specific latent heat of fusion for ethanol?
108000
What is the specific latent heat of vaporisation for water?
2.26 million
What is the specific latent heat of vaporisation of lead?
871,000
What is the specific latent heat of vaporisation for ethanol?
855,000
What are the units for specific latent heat of fusion or vaporisation?
J/Kg
How is specific latent heat different from specific heat capacity?
Latent heat is about change of state but heat capacity is about change of temperature
What is the difference between energy and temperature?
The energy in a thermal store is measured in joules (J). It depends on the arrangement of the particles and how fast they are moving or vibrating.
Temperature tells you about the average kinetic energy of the particles.
