Open Educational Resources | Pao Yue-kong Library, The Hong Kong Polytechnic University

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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

Others

Atomic Symbols, Atomic Numbers, and Mass Numbers

Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

Subjects:: Chemistry
Keywords:: Periodic table of the elements Chemical elements
Resource Type:: Others

Others

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

Others

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

Others

Calculating Formula Weight and Molecular Weight

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

Subjects:: Chemistry
Keywords:: Molecular weights Atomic weights
Resource Type:: Others

Others

Calculation of Atomic Weight from Isotopic Composition

Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

Subjects:: Chemistry
Keywords:: Chemical elements Atomic weights Copper
Resource Type:: Others

Others

Chemical Formulas

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

Subjects:: Chemistry
Keywords:: Chemistry -- Mathematics Chemical structure
Resource Type:: Others

Others

Determining Empirical and Molecular Formulas (Screencast)

Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

Subjects:: Chemistry
Keywords:: Molecular weights Chemistry Physical theoretical
Resource Type:: Others

Others

Gas Volume vs. Pressure (Boyle's Law)

Boyle's Law states that gas volume varies inversely with the pressure at constant temperature and is described by the equation PV = constant. An example of a sample of gas at two conditions of P and V is used to illustrate the law.

Subjects:: Chemistry
Keywords:: Boyle's law Gas laws (Physical chemistry)
Resource Type:: Others

Others

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

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

Ideal Gas Law

In this interactive object, learners use the ideal gas law to solve a practice problem.

Subjects:: Chemistry
Keywords:: Gas laws (Physical chemistry)
Resource Type:: Others

Others

Intermolecular Forces

In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

Subjects:: Chemistry
Keywords:: Intermolecular forces Molecules
Resource Type:: Others

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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

Others

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

Others

Lewis Dot Structures of Covalent Compounds

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

Subjects:: Chemistry
Keywords:: Chemical bonds Valence (Theoretical chemistry)
Resource Type:: Others

Others

Measuring Gas Pressure

Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.

Subjects:: Chemistry
Keywords:: Natural gas -- Measurement
Resource Type:: Others

Others

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

Others

Mole Ratios in Chemical Equations

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

Subjects:: Chemistry
Keywords:: Chemical reactions Chemical equations
Resource Type:: Others

Others

Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

Learners examine a table containing the names of common cations and anions.

Subjects:: Chemistry
Keywords:: Ionic structure Ions
Resource Type:: Others

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Absolute Zero Temperature

Atomic Symbols, Atomic Numbers, and Mass Numbers

Atomic Weight

Boiling Point of a Liquid

Calculating Formula Weight and Molecular Weight

Calculation of Atomic Weight from Isotopic Composition

Chemical Formulas

Determining Empirical and Molecular Formulas (Screencast)

Gas Volume vs. Pressure (Boyle's Law)

Gas Volume vs. Temperature (Charles's Law)

Heat of Fusion and Heat of Vaporization

Ideal Gas Law

Intermolecular Forces

Ions

Isotopes

Lewis Dot Structures of Covalent Compounds

Measuring Gas Pressure

Melting Point and Freezing Point

Mole Ratios in Chemical Equations

Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

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PolyU OER

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