Experiments of Modern Chemistry:: Simultaneous Recording of Multiple Cooling Curves

• James J. Deacutis ^[1] ; Donald R. VanSteele ^[1] ; Ronald A. Bailey ^[1] ; Sudhen B. Desai ^[1] ; Norbert F. Hepfinger ^[1] ; Henry B. Hollinger ^[1] ; Peter S. Locke ^[1] ; Kenneth J. Miller ^[1]
  1. [1] Rensselaer Polytechnic Institute

     Rensselaer Polytechnic Institute

     City of Troy, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 74, Nº 6 (June), 1997, págs. 732-733
• Idioma: inglés
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• Resumen

  • 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.