Temperature and State Flashcards
What happens to the rate of thermal energy transfer when the temperature difference is greater?
It’s greater
Why does heat flow?
Due to temperature differences
What is specific heat capacity?
The amount of energy (J) needed to raise the temperature of 1kg of substance by 1 degree (C)
What does a higher SHC in a material mean?
The more energy a material can hold therefore the longer it’ll take for the material to heat up and cool down
How do you calculate specific heat capacity?
Change in thermal energy
Mass x temperature change
Describe the temperature of a substance when it changes state
Constant
What is specific latent heat?
The energy needed to break intermolecular bonds and cause a change of state for 1kg of material
What does specific latent heat depend on?
Type of material
Change of state occurring
How do you calculate specific latent heat?
Energy
Mass
How do you calculate energy transferred with power?
Power x time
How does the structure of atoms change during a change of state?
They don’t
Are changes of state a chemical or physical change?
Physical change
How does the mass of a material change during a change of state?
It doesn’t
What is the internal energy of a solid or liquid?
The combined energy of the forces of attraction and the kinetic energy of atoms/molecules
What is the internal energy of a gas?
The kinetic energy of the atoms/molecules
