ERIC Number: EJ1189268
Record Type: Journal
Publication Date: 2018-Sep
Pages: 3
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0031-921X
EISSN: N/A
Graphic Representation of Quasi-Static Heat Exchange
Rojas, Roberto; Robles, Patricio
Physics Teacher, v56 n6 p386-388 Sep 2018
Two bodies initially at different temperatures gathered into an isolated container exchange heat and reach an equilibrium state with a common final temperature. During the process, the system is out of equilibrium and its intermediate temperature is not well defined. By conceiving a quasi-static process with infinitesimal steps from the initial to the final state, a graphic representation of the intermediate temperatures is possible. We imagine an isolated container with the bodies in compartments separated by a wall, as shown in Fig. 1. If the conductivity of the wall is controlled, the heat exchange is made gradually through a sequence of very small portions of heat flowing from one body to the other. Each step is followed by a "dead time" in order to reach a momentary equilibrium state. These graphs are useful for students who need to analyze a phase change.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A