Thermal Lens Calorimetry: A Novel Approach to the Study of Thermodynamics

There has been a great deal of interest in modernizing the physical chemistry curriculum from the perspectives of employing more modern instrumentation and new teaching methodology. This paper presents a physical chemistry experiment in which thermal lens calorimetry is used to teach some general thermodynamics principles; as well, it provides an interesting and unique experiment. The experiment addresses numerous thermodynamic concepts, which include enthalpy changes and the relationship of thermal conductivity, density, and heat capacity. In addition, other topics, such as data analysis and optics, may be addressed. Discussion topics and exercises are provided that lend themselves to more extensive dialogue and would be appropriate for cooperative teaching methods and classroom discussions