1. Chemical Reactions
Unit 2

2. Vocabulary Terms Property Physical Property Liquid Chemical Property
Physical Change
Chemical Change
Density
Boiling Point
Melting Point
State
Liquid
Gas
Solid
Condensation
Deposition
Sublimation
Vaporization

3. Property
A characteristic of a substance that can be observed.

4. Physical Property
Characteristics that can be observed, using the five senses, without changing or trying to change the composition of a substance.

5. Examples of Physical Properties
Luster
Malleability (the ability to be hammered into a thin sheet)
Ductility (the ability to be stretched into wire)
Melting Point
Boiling Point
Solubility
Color
Odor
Taste
Texture
Flexibility
Viscosity

6. Chemical Property
Characteristic that cannot be observed without altering the sample.

7. Examples of Chemical Properties
Flammability
Ability to rust
Reactivity with vinegar

8. Physical Change
Change in which the form or appearance of matter changes, but not its composition.

9. Types of Physical Changes
How it may happen
Examples
Change in shape
Change in size
Change in phase
Grinding
Cutting
Crushing
Bending
Breaking
Heating/Cooling

10. Chemical Change
Change in which the composition of a substance changes.

11. Types of Chemical Changes
Burning
Rusting
Tarnishing
Decomposing

12. Evidence of a Chemical Change
A color change
An odor change
Formation of a precipitate (you mix two liquids and make a solid)
Gas is formed (bubbles)
Changes in physical properties.

13. Quiz Time
What type of reaction is most likely occurring here?

14. Quiz Time
What type of reaction is most likely occurring here?

15. Quiz Time
What type of reaction is occurring here?

16. Density Mass of an object divided by its volume.
Can be used to identify a substance
The density of water is 1.0g/mL

17. Boiling Point
The temperature in which a liquid becomes a gas.

18. Melting Point
The temperature in which a solid becomes a liquid.

19. State
There are three states of matter:
Solid
Liquid
Gas

20. Liquid
Matter with a definite volume but no definite shape that can flow from one place to another.

21. Gas
Matter that does not have a definite shape or volume; has particles that move at high speeds in all directions.

22. Solid
Matter with a definite shape and volume; has tightly packed particles that move mainly by vibrating.

23. Let’s see what that looks like…

24. Condensation
Change of matter from a gas to a liquid state.

25. Deposition
The process by which a gas changes into a solid.

26. Sublimation
The process by which a solid changes directly into a gas.

27. Vaporization
The process by which matter changes from a liquid state to a gas state.