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ERIC Number: EJ817480
Record Type: Journal
Publication Date: 2008-Jan
Pages: 8
Abstractor: As Provided
Reference Count: 33
ISBN: N/A
ISSN: ISSN-0143-0807
New Wine in Old Flasks: A New Solution of the Clapeyron Equation
Shilo, Doron; Ghez, Richard
European Journal of Physics, v29 n1 p25-32 Jan 2008
The coexisting equilibrium states between single-component gas and condensed phases (liquid or solid) are often calculated by assuming that the condensed phase's molar volume is negligible in comparison with the gas's. Here, we present an analytic solution of Clapeyron's equation when this assumption is relaxed. It differs substantially from Clausius's solution because, mathematically, it is not always monotonic. Our solution depends essentially on the dimensionless ratio "pv/L", where p is the gas pressure, v is the condensed phase's molar volume and L is the molar latent heat of the phase transition. Similar to Clausius's, our calculation is predicated on the assumption of weakly varying L and v, and of ideal gas behaviour. These assumptions are discussed in the end of this paper. (Contains 2 figures and 14 footnotes.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://www.iop.org/EJ/journal/EJP
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A