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Direct linkPriest, Marie A.; Padgett, Lea W.; Padgett, Clifford W. – Journal of Chemical Education, 2011
A method for the construction of a Galilean thermometer out of common chemistry glassware is described. Students in a first-semester physical chemistry (thermodynamics) class can construct the Galilean thermometer as an investigation of the thermal expansivity of liquids and the temperature dependence of density. This is an excellent first…
Descriptors: Physics, Chemistry, Thermodynamics, Climate
Vollmer, M. – European Journal of Physics, 2009
The cooling of objects is often described by a law, attributed to Newton, which states that the temperature difference of a cooling body with respect to the surroundings decreases exponentially with time. Such behaviour has been observed for many laboratory experiments, which led to a wide acceptance of this approach. However, the heat transfer…
Descriptors: Heat, Climate, Laboratory Experiments, Scientific Principles
A Simple Calorimetric Experiment that Highlights Aspects of Global Heat Retention and Global Warming
Burley, Joel D.; Johnston, Harold S. – Journal of Chemical Education, 2007
In this laboratory experiment, general chemistry students measure the heating curves for three different systems: (i) 500 g of room-temperature water heated by a small desk lamp, (ii) 500 g of an ice-water mixture warmed by conduction with room-temperature surroundings, and (iii) 500 g of an ice-water mixture heated by a small desk lamp and by…
Descriptors: Climate, Energy, Change, Laboratory Experiments
Galleano, Monica; Boveris, Alberto; Puntarulo, Susana – Journal of Chemical Education, 2008
This article describes a simple and inexpensive laboratory exercise developed to understand the effect of pressure on phase equilibrium as described by the Clausius-Clapeyron equation. The only piece of equipment required is a pressure cooker adapted with a pressure gauge and a thermometer in the lid, allowing the measurement of the pressure and…
Descriptors: Climate, Science Instruction, Laboratory Experiments, Science Laboratories
Corsepius, Nicholas C.; DeVore, Thomas C.; Reisner, Barbara A.; Warnaar, Deborah L. – Journal of Chemical Education, 2007
A laboratory exercise was developed by using variable temperature powder X-ray diffraction (XRD) to determine [alpha] for MgO (periclase)and was tested in the Applied Physical Chemistry and Materials Characterization Laboratories at James Madison University. The experiment which was originally designed to provide undergraduate students with a…
Descriptors: Science Instruction, Laboratory Experiments, Measurement, Undergraduate Students
Peer reviewedSommers, Trent S.; Nahir, Tal M. – Journal of Chemical Education, 2005
Theoretical and experimental evidence for the dependence of viscosities of the real gases on temperature is described, suggesting that this dependence is greater than that predicted by the kinetic theory of gases. The experimental results were obtained using common modern instrumentation and could be reproduced by students in analytical or…
Descriptors: Physics, Laboratory Experiments, Climate, Chemistry
