Molecules & Matter- Internal Energy Flashcards
The internal energy of a substance is determined by the _______ energy of the particles and the _________ energy of the particles.
The internal energy of a substance is determined by the kinetic energy of the particles and the potential energy of all the particles.
_____ have high internal energy as the particles have high kinetic energy and high potential energy.
Gases have high internal energy as the particles have high kinetic energy and high potential energy.
Increasing the ____________ of the substance increase the internal energy.
Increasing the temperature of the substance increase the internal energy.
what are the forces found between particles
intermolecular
what is meant by the internal energy
the energy stored in a system by the particles
where is internal energy important
in changes of state
what happens to a solid if you heat it up
you increase the internal energy making it turn into a liquid (melting)
what happens to a liquid if you heat it up
we continue to increase the internal energy of the liquid making it turn into a gas (boiling)
what happens to a gas if you cool it down
we reduce the internal energy and the gas will turn back into a liquid (condensation)
what happens to a liquid if you cool it down
we reduce the internal energy and will turn it back into a solid ( freezing)
what is it called when a solid turn directly into a gas
sublimation
what happens to mass during changes of state
mass is always conserved we are not adding or taking away any particles
what type of changes are changes of state
physical changes meaning it can be reversed
what is evaporation
when a liquid turns to a gas but only on the surface of a liquid
