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what type of energy do particles have?
kinetic energy
potential energy
what is internal energy?
it is energy stored in a system by the particles
what makes up internal energy?
total kinetic energy and potential energy of all the particles- atoms and molecules- that make up a system
what happens to the internal energy when heating a solid and liquid?
the internal energy increases
what happens to the internal energy when cooling a gas and liquid?
the internal energy reduces
what is the process of a solid turning directly into a gas?
sublimation
what happens to the mass during a change of state?
nothing, the mass is conserved so we are not adding or taking away particles
what type of change occurs during a change of state?
a physical change, not a chemical change so when we reverse the state change the material will recover its original properties
what happens to the energy during evaporation and what is it?
evaporation is when a liquid turns to gas but only on the surface of a liquid
only the particles on the surface have enough energy to turn into a gas
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