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Chemistry Matter and its Properties

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Chemistry Matter and its Properties Chapter 1 part II – PowerPoint PPT presentation

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Title: Chemistry Matter and its Properties


1
ChemistryMatter and its Properties
  • Chapter 1 part II

2
Volume
  • Volume is the amount of three dimensional space
    an object occupies.

3
Matter
  • Matter has mass and takes up space.
  • On the left is grey matter

4
Mass
  • Mass is the amount of matter an object contains
  • ?Not this kind of mass

5
Mass continued
  • On Earth massweight
  • This kind of mass!!

6
Substance
  • Matter that is uniform and has a definite
    composition is called a substance.
  • Salt, Sodium Chloride, is a substance

7
Not a Substance
8
Basic Building Blocks of Matter
  • An atom is the smallest unit of an element that
    maintains the chemical identity of that element.

9
Basic Building Blocks of Matter
  • An element is a pure substance that cannot be
    broken down into simpler, stable substances and
    is made of one type of atom.

10
Basic Building Blocks of Matter
  • A compound is a substance that can be broken down
    into simple stable substances. Each compound is
    made from the atoms of two or more elements that
    are chemically bonded.

11
Properties and changes in Matter
  • Extensive properties depend on the amount of
    matter that is present.
  • volume
  • mass
  • the amount of energy in a substance.

12
Properties and Changes in Matter
  • Intensive properties do not depend on the amount
    of matter present.
  • melting point
  • boiling point
  • density
  • ability to conduct electricity
  • ability to transfer energy as heat

13
Physical Properties
  • A physical property is a quality or condition of
    a substance that can be observed or measured
    without changing the substances composition.
  • Color
  • Solubility
  • Odor
  • Hardness
  • Density
  • Melting point
  • Boiling point
  • Freezing point

14
States of Matter
15
Solid
  • Solids have definite shape and definite volume

16
Liquid
  • Liquids are a definite volume but indefinite
    shape.

17
Liquids
18
Gas
  • Gas has indefinite volume and indefinite shape

19
Plasma
  • Plasma is a high-temperature physical state of
    matter in which atoms lose most of their
    electrons, particles that make up atoms.

20
Physical changes
  • Changes that alter matter without altering the
    chemical composition are physical changes

21
Physical changes
  • Boil
  • Freeze
  • Grind
  • Cut
  • Crush
  • Melt
  • Break
  • Crack
  • Bend
  • Dissolve
  • Condense

22
Chemical Change versus Physical Change
  • A chemical property relates to a substances
    ability to undergo changes that transform it into
    different substances
  • A change in which one or more substances are
    converted into different substances is called a
    chemical change or chemical reaction.

23
Chemical Properties and Chemical Changes
  • The reactants are the substances that react in a
    chemical change.
  • The products are the substances that are formed
    by the chemical change.
  • reactants products
  • Carbon plus oxygen yields (or forms) carbon
    dioxide.
  • carbon oxygen ? Carbon dioxide

24
Properties of Reactants Products
25
Chemical and Physical Changes
  • A Physical Change is a change in state only. The
    original component or components remains.
  • A Chemical Change is a reaction. A new component
    or components are formed.

26
Chemical or Physical Change?
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