Thermodynamics Fundamental Equation of a 鈥淣on-Ideal鈥?Rubber Band from Experiments
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- 作者：Hern谩n A. Ritacco ; Juan C. Fortunatti ; Walter Devoto ; Eugenio Fern谩ndez-Miconi ; Claudia Dominguez ; Miguel D. Sanchez
- 刊名：Journal of Chemical Education
- 出版年：2014
- 出版时间：December 9, 2014
- 年：2014
- 卷：91
- 期：12
- 页码：2195-2199
- 全文大小：276K
- ISSN：1938-1328
文摘
In this paper, we describe laboratory and classroom exercises designed to obtain the fundamental equation of a rubber band by combining experiments and theory. The procedure shows students how classical thermodynamics formalism can help to obtain empirical equations of state by constraining and guiding in the construction of the physical models for the system under investigation. It also serves as an 鈥渆xperimental鈥?link to statistical thermodynamics models for a rubber band, which is taught to students in more advanced courses. The rubber band system also serves as an example of a 鈥渘on-ideal鈥?thermodynamics system to introduce a van der Waals-like equation in a context different from gases.