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ERIC Number: ED118349
Record Type: Non-Journal
Publication Date: 1973
Pages: 147
Abstractor: N/A
Reference Count: N/A
ISBN: N/A
ISSN: N/A
Development and Field Testing of a Model to Simulate a Demonstration of Le Chatelier's Principle Using the Wheatstone Bridge Circuit.
Vickner, Edward Henry, Jr.
An electronic simulation model was designed, constructed, and then field tested to determine student opinion of its effectiveness as an instructional aid. The model was designated as the Equilibrium System Simulator (ESS). The model was built on the principle of electrical symmetry applied to the Wheatstone bridge and was constructed from readily available components at a total cost of approximately $95. The ESS and associated educational materials were evaluated by means of field testing in three high schools and junior college chemistry classes. Evaluation was accomplished by utilizing questionnaires to obtain students' opinions as to the effectiveness of the ESS as an instructional aid. Feedback was used to revise the instrument and the classroom presentations of the topic. The ESS, a teacher's manual, a lecture demonstration manual, and a previously prepared programmed unit were used during each of three presentations. It was concluded that the device could serve satisfactorily as an instructional model for teaching Le Chatelier's Principle. It was also reported that it was possible to construct an inexpensive and compact model which simulates the effects of externally imposed stresses on chemical systems at equilibrium. (Author/EB)
University Microfilms, 300 North Zeeb Road, Ann Arbor, Michigan 48106 (Order No. 74-1833, MF $7.50, Xerography $15.00)
Publication Type: Dissertations/Theses
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A