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

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Vapor Pressure

Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.

Subjects:: Chemistry
Keywords:: Vapor pressure
Resource Type:: Others

Others

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

Others

The Mole and Avogadro's Number

Learners examine how chemists use moles to "count" atoms by weight. Examples are given.

Subjects:: Chemistry
Keywords:: Mole (Chemistry) Chemical elements Avogadro's law
Resource Type:: Others

Others

The Limiting Reagent in Chemical Reactions

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

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

Others

The Kinetic Theory of Gases

In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.

Subjects:: Chemistry
Keywords:: Kinetic theory of gases Gas dynamics
Resource Type:: Others

Others

The Effect of Temperature on the Vapor Pressure of a Liquid

Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.

Subjects:: Chemistry
Keywords:: Vapor pressure
Resource Type:: Others

Others

The Combined Gas Law

Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.

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

Others

Solubility of Ionic Compounds in Water

Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.

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

Others

Precipitation Reactions

In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Step-by-step examples are given.

Subjects:: Chemistry
Keywords:: Chemical reactions Solution (Chemistry)
Resource Type:: Others

Others

Phase Transitions

Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.

Subjects:: Chemistry
Keywords:: Thermodynamics Phase transformations (Statistical physics)
Resource Type:: Others

Others

Phase Diagrams

Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.

Subjects:: Chemistry
Keywords:: Phase diagrams
Resource Type:: Others

Others

Oxidation-Reduction Reactions

Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.

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

Others

Oxidation States of Ions

Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.

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

Others

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

Others

Naming Compounds Containing Polyatomic Ions

Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

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

Others

Naming Binary Ionic Compounds Containing Variable Oxidation State Cations (Screencast)

Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

Subjects:: Chemistry
Keywords:: Ionic structure Ions
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

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

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

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

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Vapor Pressure

The Solid State

The Mole and Avogadro's Number

The Limiting Reagent in Chemical Reactions

The Kinetic Theory of Gases

The Effect of Temperature on the Vapor Pressure of a Liquid

The Combined Gas Law

Solubility of Ionic Compounds in Water

Precipitation Reactions

Phase Transitions

Phase Diagrams

Oxidation-Reduction Reactions

Oxidation States of Ions

Oxidation Numbers

Naming Compounds Containing Polyatomic Ions

Naming Binary Ionic Compounds Containing Variable Oxidation State Cations (Screencast)

Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

Mole Ratios in Chemical Equations

Melting Point and Freezing Point

Measuring Gas Pressure

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