internal energy and change of state Flashcards
(12 cards)
What is internal energy
The total energy stored by particles in a system
What do particles in the system do
Vibrate or move around they have Energy in the kinetic energy stores they also have potential energy store is due to the positions
How is the energy stored in the system
It’s stored by its particles , atoms and molecules
What is the internal energy of a system
The total energy that its particles have in the kinetic and potential energy stores
What happens if you heat the system
It transfers energy to its particles and they gain energy in the kinetic store and the faster and increases the internal energy
What happens if the temperature changes in the system
The size of the change depends on the mass of a substance made of
When does a change in state occur
If the substance is heated enough the particles will have enough energy in the kinetic stores to break the bonds holding them together
What happens If you heat a liquid
It boils and a separate and becomes a gas
What happens when you heat a solid
It melts and becomes a liquid
What are the changes of state
Freezing
melting
boiling
evaporating
condensing
sublimating
What is the change of state
A physical change not a chemical change
what happens if you reverse a change of state
Substance Will return to its original form and get back it’s original properties
