Activity Number 24

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

Chemical Equilibrium (demo)

Interactive model, with minimal support

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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; observe, both through looking at the model and a graph, how changing the temperature changes the percentage of the various chemical species in the reaction. return to top



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



	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 return to top



	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 return to top



	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) return to top



	Activity Credits Created by CC Project: CCATOMS using Molecular Workbench return to top



	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. return to top

These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701 and EIA-0219345

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.

Chemical Equilibrium (demo)

Overview and Learning Objectives

Assessment

Central Concepts

Additional Related Concepts

Textbook References

Benchmarks and Standards

Activity Credits

Requirements