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ERIC Number: EJ820755
Record Type: Journal
Publication Date: 2007-Mar
Pages: 5
Abstractor: As Provided
Reference Count: 42
ISSN: ISSN-0021-9584
Pressure-Volume Integral Expressions for Work in Irreversible Processes
Gislason, Eric A.; Craig, Norman C.
Journal of Chemical Education, v84 n3 p499-503 Mar 2007
Different formulations of thermodynamic work "w" as a pressure-volume integral are examined for a piston moving against a gas in an irreversible process. Proper expressions are obtained using the instantaneous pressure of the gas on the piston as the integrand and also using certain external pressures as the integrand. There are two common yet different ways to define thermodynamic work, and results are obtained for both definitions. In addition, the contribution to "w" of the atmosphere in such processes is evaluated. An example is given that illustrates the points made in the paper. (Contains 2 tables and 1 figure.)
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:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: High Schools; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A