2.1 Properties of matter
How can properties used to describe matter be classified?
Properties used to describe matter can be classified as extensive or intensive.
Themass of an object is a measure of the amount of matter the object contains.
The volume of an object is a measure of the space occupied by the object.
An extensive property is a property that dependson the amount of matter in a sample.
An intensive property is a property that depends on the type of matter in a sample not the amount of matter. The hardness of a bowlingball is an example of an intensive property.
Identifying Substances - Why do all samples of a substance have the same intensive property?
Matter that has a uniform and definite composition iscalled a substance. Copper and gold is an example of substances.
Every sample of a given substance has identical intensive properties because every sample has the same composition.
A physicalproperty is a quantity or condition of a substance that can be observed or measured without changing the substance composition.
Hardness, color, conductivity and malleability are examples of physicalproperties.
States of matter
What are the 3 states of matter?
Solid, liquid and gas.
A solid is a form of matter that has a definite shape and volume.
A liquid is a form ofmatter that has an indefinite shape that flows, yet has a fixed volume.
A gas is a form of matter that takes both the shape and volume of its container.
Vapor describes the gasses state of asubstance that is generally a liquid or solid at room temperature as in water vapor.
2.2 Classifying mixtures
- A mixture is a physical blend of two or more components.
Based on the distributionof their components mixtures can be classified as heterogeneous mixtures or homogeneous mixtures.
- Heterogeneous Mixtures: a mixture in which the composition is not uniform throughout is a...
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