Activity Number
24
Editable
Overview and Learning Objectives
Assessment
Central Concepts
Textbook References
Benchmarks and Standards
Activity Credits
Requirements

Chemical Equilibrium (1-page activity)

Interactive model, with minimal support

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This Activity Requires:

  • Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead.

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Overview and Learning Objectives

Students explore reversible reactions occurring within a closed system.

With the help of an accompanying graph of A2s, B2s, and ABs, students investigate dynamical equilibria.

Students will be able to:

  • change the temperature of a system in chemical equilibrium;
  • change dissociation energies
  • observe, both through looking at the model and a set of graphs, how changing the temperature changes the percentage of the various chemical species in the reaction.

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Assessment

Describe how temperature affects the amounts of A2, B2, and AB present in the reaction chamber.

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Central Concepts

Key Concept:

Systems in chemical equilibrium can be affected by temperature, causing the percentage of various chemical species to be more or less prevalent.

Additional Related Concepts

Biology

  • Waste Disposal

Physics/Chemistry

  • Activation energy
  • Bonds
  • Breaking bonds
  • Chemical reaction
  • Concentration
  • Reaction rate
  • Reversability of reaction
  • Temperature

Systems

  • Equilibrium

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Textbook References

  • Biology (Prentice-Hall) New York Edition - Chapter Two - The Chemistry of Life
  • Biology: Concepts and Connections (Pearson) 5th Edition - Chapter 5: The Working Cell
  • BSCS Blue (8th Edition) - Chapter 3: Exchanging Materials with the Environment
  • Cell Biology (Pollard and Earnshaw) Saunders 2002 - Chapter Three: Basic Biophysical Concepts

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Benchmarks and Standards

AAAS

  • THE PHYSICAL SETTING: THE STRUCTURE OF MATTER - The rate of reactions among atoms and molecules depends on how often they encounter one another, which is affected by the concentration, pressure, and temperature of the reacting materials (Full Text of Standard)

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Activity Credits

Created by CC Project: CCATOMS using Molecular Workbench

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Requirements

  • Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead.

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NSF Logo
These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701, EIA-0219345, DUE-0402553, and 0628181.

Any opinions, findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.