# Properties used to describe matter can be classified as extensive or intensive. - PowerPoint PPT Presentation

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## Properties used to describe matter can be classified as extensive or intensive.

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### Describing Matter Properties used to describe matter can be classified as extensive or intensive. An extensive property is a property that depends on the amount of ... – PowerPoint PPT presentation

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Title: Properties used to describe matter can be classified as extensive or intensive.

1
Describing Matter
• Properties used to describe matter can be
classified as extensive or intensive.
• An extensive property is a property that depends
on 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.

2
Describing Matter
2.1
• Extensive properties depend on amount.
• The mass 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.

The big ball has more mass and volume than the
little ball.
3
Describing Matter
2.1
• Intensive Properties
• The hardness of a bowling ball is an example of
an intensive property.

4
Is flammability an extensive or intensive
property?
5
Identifying Substances
2.1
• Matter that has a uniform and definite
composition is called a substance.
• A substance is pure.

6
Identifying Substances
2.1
• Every sample of a given substance has identical
intensive properties because every sample has the
same composition.
• Example- Every sample of pure water is a clear,
odorless, liquid at room temperature. The water
will boil at 100ºC and freeze at 0ºC. These
properties are intensive because they do not
depend on how big the sample is.

7
Identifying Substances
2.1
• A physical property is a quality or condition of
a substance that can be observed or measured
without changing the substances composition.
• Hardness, color, conductivity, and malleability
are examples of physical properties.

8
Identifying Substances
2.1
9
States of Matter
2.1
• What are three states of matter?
• Three states of matter are solid, liquid, and
gas.

10
States of Matter
2.1
• Solids
• A solid is a form of matter that has a definite
shape and volume.

11
States of Matter
2.1
• Liquid
• A liquid is a form of matter that has an
indefinite shape, flows, yet has a fixed volume.

12
States of Matter
2.1
• Gases
• A gas is a form of matter that takes both the
shape and volume of its container.
• The gas state is the only state of matter that is
compressible.

13
States of Matter
2.1
• Vapor describes the gaseous state of a substance
that is generally a liquid or solid at room
temperature, as in water vapor.

14
States of Matter
• Macroscopic qualities- volume, shape, and
compressibility
• Microscopic properties- Relate the states of
matter to the arrangements of their particles.

15
States of matter- the 3 forms at which matter
exists
Solid- particles are tightly packed in a rigid
structure. Has a shape and a fixed volume!
Liquid- particles are very close but can move
around each other. Takes the shape of its
container, but has a fixed volume.
Gas- particles are far apart and have little
effect on each other. Has no fixed shape or
volume.
16
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17
Substances go from solid to liquid to gas as
energy increases.
18
Physical Changes
2.1
• During a physical change, some properties of a
material change, but the composition of the
material does not change.
• As gallium melts in a persons hand, the shape of
the sample changes, but the composition of the
material does not change.

19
Physical Changes
2.1
• Physical changes can be classified as reversible
or irreversible.
• All physical changes that involve a change from
one state to another are reversible.
• Cutting hair, filing nails, and cracking an egg
are examples of irreversible physical changes.

20
2.1 Section Quiz.
• 1.Which of the following would be described as an
extensive property of matter?
• temperature
• color
• mass
• hardness

21
2.1 Section Quiz.
• 2. Which properties can be observed without
changing the composition of a substance?
• all properties of a substance
• intensive properties
• chemical properties
• physical properties

22
2.1 Section Quiz.
• 3. Match the states of matter with the following
descriptions
• (1) takes the volume and shape of its container
• (2) has a definite shape and volume
• (3) has a definite volume but an indefinite shape
• (1) liquid, (2) solid and (3) gas
• (1) gas, (2) solid, and (3) liquid
• (1) gas, (2) liquid, and (3) solid