Experiments of Modern Chemistry: Simultaneous Recording of Multiple Cooling Curves

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 s...

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Bibliographic Details
Published in:Journal of chemical education 1997-06, Vol.74 (6), p.732
Main Authors: Deacutis, James J, VanSteele, Donald R, Bailey, Ronald A, Desai, Sudhen B, Hepfinger, Norbert F, Hollinger, Henry B, Locke, Peter S, Miller, Kenneth J
Format: Article
Language:English
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Summary: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.
ISSN:0021-9584
1938-1328
DOI:10.1021/ed074p732