A system's internal energy is the total of its what two energy stores?
Kinetic and potential
Transferring energy to an object will increase it's particles _________ energy.
Kinetic
Particles in a solid at room temperature are not moving [True/False]
False, they are vibrating.
The thermal energy of a system is the total _______ ________ of the particles in the system
Kinetic energy
The temperature of a system is the ___________ kinetic energy of the particles in the system.
average
A solid is incompressible because the particles are closely arranged [True/False]
True
A liquid is compressible because the particles are free to move about one another [True/False]
False - the particles are still closely arranged so incompressible
What is the change of state from liquid to gas called?
boiling / evaporation
What is the change of state from gas to liquid called?
Condensing
What is the change of state from solid to liquid called?
Melting
What is the change of state from liquid to solid called?
Freezing
A change of state is a Physical or Chemical change?
Physical - no new substance is formed and it is reversible.
Why does this heating vs temperature graph have two horizontal parts?
The object is changing state, energy is used to break bonds not increase the temperature
What is the specific latent heat of vaporisation?
The energy needed to turn 1kg of a substance from a liquid to a gas
What is the specific latent heat of fusion?
The energy needed to turn 1kg of a substance from a solid to a liquid.
What is Archimedes principle?
When an object is submerged in water, it will displace the same amount of water as its own volume.
