LESSON 5: HEAT AND ITS EFFECTS ON STATE
Reviewing Ideas:
- We know that thermal energy is related to heat
- In scientific terms, thermal energy is the total energy of all the moving particles in a solid, liquid or gas. The more moving particles, the greater the thermal energy
Think About It: Considering the definition of thermal energy, what state of matter do you think has the most thermal energy?
Change of State and the Particle Theory
Remember the particle theory? It plays a big role in heat flow:
- As energy is transferred to a particle, its thermal energy increases and it moves faster
- For example, if we boil a pot of water, we transfer energy to all the particles of water, increasing their energy and speeding them up
- As the energy of motion increases (its thermal energy), the temperature increases. Heat has been transferred and the particles change state
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