Chemical Reactions

Unit 2

Vocabulary Terms

Property Physical Property Chemical Property Physical Change Chemical Change Density Boiling Point Melting Point State

Liquid Gas Solid Condensation Deposition Sublimation Vaporization

A characteristic of a substance that can be observed.

Property

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

Physical Property

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

Characteristic that cannot be observed without altering the sample.

Chemical Property

FlammabilityAbility to rustReactivity with vinegar

Examples of Chemical Properties

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

Physical Change

Types of Physical Changes

Examples

Change in shape Change in size Change in phase

How it may happen

Grinding Cutting Crushing Bending Breaking Heating/Cooling

Change in which the composition of a substance changes.

Chemical Change

BurningRustingTarnishingDecomposing

Types of Chemical Changes

A color changeAn odor changeFormation of a precipitate (you mix two liquids and make a solid)

Gas is formed (bubbles)Changes in physical properties.

Evidence of a Chemical Change

Quiz Time

What type of reaction is most likely occurring here?

Quiz Time

What type of reaction is most likely occurring here?

Quiz Time

What type of reaction is occurring here?

Mass of an object divided by its volume.

Can be used to identify a substance

The density of water is 1.0g/mL

Density

The temperature in which a liquid becomes a gas.

Boiling Point

The temperature in which a solid becomes a liquid.

Melting Point

There are three states of matter:Solid LiquidGas

State

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

Liquid

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

Gas

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

Solid

Let’s see what that looks like…

Change of matter from a gas to a liquid state.

Condensation

The process by which a gas changes into a solid.

Deposition

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

Sublimation

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

Vaporization