ERIC Number: EJ820887
Record Type: Journal
Publication Date: 2007-Mar
Pages: 4
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Discovering the Thermodynamics of Simultaneous Equilibria: An Entropy Analysis Activity Involving Consecutive Equilibria
Bindel, Thomas H.
Journal of Chemical Education, v84 n3 p449-452 Mar 2007
An activity is presented in which the thermodynamics of simultaneous, consecutive equilibria are explored. The activity is appropriate for second-year high school or AP chemistry. Students discover that a reactant-favored (entropy-diminishing or endergonic) reaction can be caused to happen if it is coupled with a product-favored reaction of sufficient entropy production or exergonicity. A variety of six product-favoring reactions are individually coupled with the reactant-favored reaction. The experimental results are correlated with the change in the entropies of the universe ([Delta]S[subscript univ]), the change in the standard-state free energies ([Delta][subscript r]G[degree]), and the various equilibrium constants (K). (Contains 3 tables and 4 notes.)
Descriptors: Thermodynamics, Chemistry, Scientific Concepts, Science Instruction, Learning Activities, High School Students, Secondary School Science, Advanced Placement, Science Experiments, Measurement Techniques, Energy
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A