The Isothermal Heat Conduction Calorimeter: A Versatile Instrument for Studying Processes in Physics, Chemistry, and Biology

• Thomas Hofelich ^[3] ; Lars Wadsö ^[1] ; Allan L. Smith ^[2] ; Hamid Shirazi ^[2] ; S. Rose Mulligan ^[2]
  1. [1] Lund University

     Lund University

     Suecia

     
  2. [2] Drexel University

     Drexel University

     City of Philadelphia, Estados Unidos

     
  3. [3] Dow Chemical Company, United States

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• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 8, 2001, pág. 1080
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • An approach to teaching calorimetry is offered through practical, versatile undergraduate experiments using an isothermal heat conduction calorimeter, which measures a variety of heat changes--enthalpies of phase changes, hydration, dissolution, adsorption and desorption, and reaction--as well as the metabolic rate of living organisms. Isothermal heat-conduction calorimetry is contrasted with adiabatic calorimetry. The general design and calibration of an instrument is discussed and five student experiments are described: heat capacity of solids, enthalpy of acid-base reaction, enthalpy of vaporization, hydration of cement, and metabolic rates of insects.