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ERIC Number: EJ820859
Record Type: Journal
Publication Date: 2007-Oct
Pages: 3
Abstractor: As Provided
Reference Count: 10
ISBN: N/A
ISSN: ISSN-0021-9584
A Simple Calorimetric Experiment that Highlights Aspects of Global Heat Retention and Global Warming
Burley, Joel D.; Johnston, Harold S.
Journal of Chemical Education, v84 n10 p1686-1688 Oct 2007
In this laboratory experiment, general chemistry students measure the heating curves for three different systems: (i) 500 g of room-temperature water heated by a small desk lamp, (ii) 500 g of an ice-water mixture warmed by conduction with room-temperature surroundings, and (iii) 500 g of an ice-water mixture heated by a small desk lamp and by conduction with room-temperature surroundings. The students verify that heat is consumed in the melting of ice, with no increase in temperature until all the ice has melted. The fundamental calorimetric principles demonstrated by the lab results are then directly connected to the topic of global warming, and a more precise terminology--one that distinguishes between global heat retention and global warming--is developed to help students better assess and understand the experimental evidence associated with global warming. (Contains 1 figure and 1 note.)
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 - Research
Education Level: Higher Education
Audience: Students
Language: English
Sponsor: N/A
Authoring Institution: N/A