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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > March  >
Chemical Education Today
JCE Classroom Activity
Cool! Rates of Heating and Cooling
Martin Bartholow
Johnson County Community College, Overland Park, KS 66213,
Cover
March 2007
Vol. 84 No. 3
p. 448A

Abstract
In this Activity, students measure and graph the rate of warming for a chilled thermometer bulb held in room temperature air, for a chilled bulb held between two fingers, and for a few milliliters of chilled water. Students are familiar with the everyday phenomena of warming, but measurement affords the unexpected result that the process is not linear. An extension allows student inquiry into how different variables affect the rate of warming of water. Measuring temperature change is foundational for other experiments, and rates of warming and cooling can lead into a kinetic description of heat and matter. The Activity can also be related to Newton's Law of Cooling.
Supplement
Sample data and graphs from this activity are available.
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Citation
Bartholow, Martin. J. Chem. Educ. 2007 84 448A.
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Keywords
Calorimetry / Thermochemistry; High School / Introductory Chemistry; Inquiry-Based / Discovery Learning; Physical Chemistry
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History
Created:
Last Updated:
2/1/2007
2/22/2007
 Caution! 
Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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