Experiments of Modern Chemistry: Simultaneous Recording of Multiple Cooling Curves

James J. Deacutis and Donald R. VanSteele
Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
Ronald A. Bailey , Sudhen B. Desai , Norbert F. Hepfinger , Henry B. Hollinger , Peter S. Locke and Kenneth J. Miller
Department of Chemistry, Rensselaer Polytechnic Institute, Troy, NY 12180
J. Chem. Educ., 1997, 74 (6), p 732
DOI: 10.1021/ed074p732
Publication Date (Web): June 1, 1997

Abstract

An apparatus for simultaneous recording of six heating/cooling curves of metallic mixtures is described. Data are recorded using computer data acquisition and temperature-time data displayed and printed out for evaluation. A reasonable set of data for plotting the phase diagram for the tin-bismuth system can be obtained from heating curves alone in 20 minutes; slightly better data from cooling curves can be obtained in 45 minutes. This allows the experiment to be completed and discussed as part of a single lecture-laboratory period.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Computer-Based Learning

Keywords (Subject):

Laboratory Equipment / Apparatus
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  • Received: August 03, 2009

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