physics internal energy

3

what happens to the particles In a system when they vibrate/ move around?

. Energy in their KINTETIC ENERGY STORES

. The more energy they have in their KINTETIC energy store, the FASTER the particles move

What other energy store do particles have due to their positions?

. POTENTIAL ENERGY STORE

. The FURTHER APART the particles are from each other, the MORE ENERGY they have in their POTENTIAL energy store.

How is the energy stored in a system?

BY its PARTICLES

what is the INTERNAL energy in a system from?

the amount of energy particles have in their KINETIC + POTENTIAL ENERGY stores

what is the THERMAL ENERGY STORE made out of?

JUST the KINETIC ENERGY STORES of its particles

what does HEATING a system do to its particles?

• transfers energy to its particles

• so, heating will always increase the particles INTERNAL ENERGY

this leads to ..

a CHANGE IN STATE/TEMPERATURE

change in temperature;

energy is transferred to the KINETIC ENERGY STORE of its particles

change in state;

energy is transferred to POTENTIAL ENERGY STORE of particles