Modeling "Entropy Vs Temperature" Changes for a Gas

While a good physical model exists for entropy changes during the expansion of a gas, no comparable model for entropy changes brought about by temperature variations has ever been suggested. However, a physical model for such entropy changes was proposed by S. Singh in June 1994.

We are continuing to develop this model further for entropy changes in a gas during cooling processes by relating it to the reduction of chaos (i.e. as the temperature is lowered clusters of molecules begin to move in unison). From experimental values of entropy the cluster sizes are calculated using statistical mechanics and chaos theory functions in order to obtain a clearer insight into nucleation processes. The results are then verified experimentally.

A working knowledge of any computer language will be very helpful for this project. The project is also open to Physics, Mathematics, and ISM majors.

Mass Transfer of Pollutants in the Atmosphere

It is our contention that there are definite environmental parameters which control the mass transfer of pollutants in the upper atmosphere. These parameters play a major role in determining the lifetime and eventual fate of airborne pollutants. Besides, chemical environment also determines the rate of nucleation and the growth and subsequent structure of ice crystals in the troposphere. We are trying to investigate these parameters experimentally using a specialized apparatus fabricated in our laboratory. Knowledge of low temperature and vacuum techniques and some photochemistry will be helpful. Both projects are of interest to the US Air Force, possibly offering good career opportunities later.