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    Gas Volume vs. Temperature (Charles's Law)

    Gas Volume vs. Temperature (Charles's Law)

    In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.

    Subjects:
    Chemistry
    Keywords:
    Charles' law Gas laws (Physical chemistry) Gase -- Thermal properties
    Resource Type:
    Others
     
  • Others 
    Heat of Fusion and Heat of Vaporization

    Heat of Fusion and Heat of Vaporization

    Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.

    Subjects:
    Chemistry
    Keywords:
    Heat
    Resource Type:
    Others
     
  • Others 
    Boiling Point of a Liquid

    Boiling Point of a Liquid

    Learners examine how the boiling point increases with increasing pressure. An example from industry is given.

    Subjects:
    Chemistry
    Keywords:
    Boiling-points
    Resource Type:
    Others
     
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    Isotopes

    Isotopes

    The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.

    Subjects:
    Chemistry
    Keywords:
    Isotopes
    Resource Type:
    Others
     
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    Atomic Weight

    Atomic Weight

    Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

    Subjects:
    Chemistry
    Keywords:
    Periodic table of the elements Chemical elements Atomic weights
    Resource Type:
    Others
     
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    Absolute Zero Temperature

    Absolute Zero Temperature

    Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.

    Subjects:
    Chemistry
    Keywords:
    Temperature Low temperatures
    Resource Type:
    Others
     
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    Melting Point and Freezing Point

    Melting Point and Freezing Point

    Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.

    Subjects:
    Chemistry
    Keywords:
    Melting points Freezing points
    Resource Type:
    Others
     
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    Oxidation Numbers

    Oxidation Numbers

    Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.

    Subjects:
    Chemistry
    Keywords:
    Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
    Resource Type:
    Others
     
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    The Solid State

    The Solid State

    In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.

    Subjects:
    Chemistry
    Keywords:
    Solid state chemistry
    Resource Type:
    Others
     
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    Ions

    Ions

    Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

    Subjects:
    Chemistry
    Keywords:
    Ions
    Resource Type:
    Others