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A Virtual Instrument Panel and Serial Interface for the Parr 1672 Thermometer

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Gail Salter

Department of Chemistry, Lafayette College, Easton, PA 18042-1782

Kevin Range

Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431

Carl Salter

Department of Chemistry, Moravian College, Bethlehem, PA 18018

J. Chem. Educ., 2005, 82 (2), p 297

DOI: 10.1021/ed082p297

Publication Date (Web): February 1, 2005

Section:

History, Education, and Documentation

Abstract

A program written in Visual Basic 6.0 provides a virtual instrument panel and real-time interface for the Parr 1672 thermometer. The program permits computer control and data acquisition when the 1672 thermometer is used for a bomb calorimetry or solution calorimetry experiment. Details of the serial communication link between the 1672 and the remote computer are described. An unusual calorimetry experiment demonstrates the desirability of real-time display of thermometric data: when solid oxalic acid is mixed with a limited amount of NaOH the initial exothermic neutralization reaction is followed by a slower endothermic solution of the excess oxalic acid. The overall temperature change of the process is less than 0.001 °C even though the peak temperature increase is almost 0.3 °C. Without a graphical display of the thermogram this unusual temperature spike might be missed.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Computer-Based Learning

Keywords (Subject):

Calorimetry / Thermochemistry

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Thermochemistry to the Rescue: A Novel Calorimetry Experiment for General Chemistry
Michael W. Vannatta and Michelle Richards-Babb, Robert J. Sweeney
Journal of Chemical Education2010 87 (11), 1222-1224
- Thermochemistry to the Rescue: A Novel Calorimetry Experiment for General Chemistry
  Michael W. Vannatta and Michelle Richards-Babb, Robert J. Sweeney
  Journal of Chemical Education2010 87 (11), 1222-1224
  A novel calorimetry experiment that (i) provides “real-world” connections, (ii) assists students in learning thermochemistry, and (iii) uses equipment commonly found in an undergraduate general chemistry laboratory was implemented at our institution. ...
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