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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > August  >
In the Laboratory
The Microscale Laboratory
Thermal Equilibrium in Plastic and Glass Microscale Containers
Estela Curbelo, María F. Cerdá, and Eduardo Méndez
Laboratorio de Biomateriales, Instituto de Química Biológica, Facultad de Ciencias de la Universidad de la República, 11400 Montevideo, Uruguay
Cover
August 2007
Vol. 84 No. 8
p. 1326

Abstract
Thermal equilibration of solutions in plastic microscale containers is achieved more slowly than in glass containers, owing to the lower thermal conductivity of plastic materials. The extended thermal equilibration time should be taken into account in the design of microscale experiments, particularly in physical chemistry, where measurements have to be carried out under thermodynamic equilibrium conditions.
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Derivations of equations 1–3 are available.
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Citation
Curbelo, Estela; Cerdá, María F.; Méndez, Eduardo. J. Chem. Educ. 2007, 84, 1326.
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Keywords
Graduate Education / Research; Hands-On Learning / Manipulatives; Heat Capacity; Laboratory Equipment / Apparatus; Laboratory Instruction; Microscale Lab; Physical Chemistry; Second-Year Undergraduate; Thermodynamics; Upper-Division Undergraduate
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History
Created:
Last Updated:
6/22/2007
7/5/2007
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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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