1. Phase Changes and Heating Curve of Water

2. Temperature Temperature – the measure of particles moving
Higher temperature = Fast moving particles
Lower temperature = Slow moving particles

3. Thermal Energy
Thermal Energy – TOTAL energy of all particles (KE + PE)
ALL matter has thermal energy

4. Heat
Heat – the amount of thermal energy that is transferred to an object or area
EX: Cooking an egg
(Hot stove  frying pan  egg

5. States of Matter
4 States of Matter
Solid
Liquid
Gas
Plasma

6. Phase Properties Phase Atoms Packed Energy Solid Closest Little Liquid
Moderate
Gas
Far
A Lot

7. Phase Changes
As heat is added or taken, matter can change its state or phase

8. Phase Changes Changes States Involved Melting Solid → Liquid Freezing
Liquid → Solid
Vaporization
Liquid → Gas
Condensation
Gas → Liquid
Sublimation
Solid → Gas
Deposition
Gas → Solid

9. Phase Changes

10. Heat Transmission Endothermic – Heat goes INTO an
object or reaction.
Example: Vinegar and Baking Soda is a chemical reaction that gets COLDER when mixed. Heat In.
Exothermic – Heat is RELEASED from an object or reaction.
Example: A Combustion Reaction is heat being released from a chemical reaction; Flaming Bubbles! Heat Out.

11. Heat Transmission
How many types of reactions can you name that are endothermic or exothermic?

12. Heating Curve of Water
Water is matter that can go through ALL the different phase changes

13. Heating Curve of Water
There is NO temperature change during a Change of Phase!

14. What is the phase change called from B to C?
Which letters represent a gas?
What is the phase change called from D to E?
Which letters represent a solid?
What is the phase change called from E to D?
What is the phase change called from C to B?
What is the temperature change when a phase change occurs?