4.3.2 P1 Internal Energy and Energy Transfers (will come up) Flashcards
What is the internal energy of a substance
The energy stored by the particles
The sum of the total kinetic and potential energies that make up the system
How does heating affect the energy of a substance
Heating transfers energy to the substance
It increases the energy of the particles that make up the substance
What 2 things can heating a substance do
Raise its temperature
Change the state of the substance
What 3 factors determine the temperature change of a system
Mass of substance being heated
Type of material
Energy inputted into the system
Units of specific heat capacity
J/kg/degrees C
Define specific heat capacity
The amount of energy needed to increase the temperature of 1kg of a substance by 1 degree C
How the internal energy and temperature of a substance change when a change of state occurs
The internal energy of the substance will be increased or decreased
The temperature of the substance will remain constant
What is specific latent heat
The amount of energy needed to change the state of 1kg of a substance with no change in temperature
Units for specific latent heat
J/kg
What is the specific latent heat of fusion
The energy required to change 1kg of a substance from solid state to liquid state without a change in temperature
What is the specific latent heat of vaporisation
The energy needed to change 1kg of a substance from liquid state to gas state without a change in temperature
Draw a change of state diagram
Label where the changes of state occur on the graph
