Discusses an equation that describes the variation with temperature of acid dissociation constants. (MLH)

Several questions (and answers) regarding the effect of environmental variables on organisms are presented. (RH)

Suggests ways in which the "drinking duck," a seemingly self-propelled duck toy, can be used to illustrate the principles of phase equilibria and thermodynamics. (MLH)

Five brief items are discussed. They include (1) preservation of reactive ions in solid solution, (2) the molecular partition function, (3) purification of methoxychlor, (4) a kinetics experiment, and (5) determining molecular weights of acids. (RWH)

A technique is described for the generation of perspective views of three-dimensional models using computer graphics. The technique is applied to models of familiar thermodynamic phase diagrams and the results are presented for the ideal gas and van der Waals equations of state as well as the properties of liquid water and steam from the Steam…

Reviews the history of selected topics in physical chemistry, including kinetics, thermodynamics, quantum chemistry, and nuclear chemistry. (MLH)

Reports on technological advancements in the fields of solar collectors, thermal storage systems, and solar heating and cooling systems. Diagrams aid in the understanding of the thermodynamics of the systems. (CP)

Presents a simple model whereby the work per cycle done on an external agent, and a sand reservoir, by a reversible heat engine can be analyzed explicitly. (Author/SL)

Uses the intersecting parabola model to derive an equation that relates the observed free energy of activation for a slow proton transfer to the overall thermodynamic free energy change in the reaction. (MLH)

Describes an advanced undergraduate experiment in which the stepwise stability constants of hi(II)-cysteine chelate are determined. (MLH)

Discusses the fact that heat only exists at the boundary of a system as energy is being transferred because of a temperature difference between the system and the surroundings. Points out that many texts incorrectly refer to heat as a system component. (MLH)

Inquires into the individual names and dates which are associated with the various perfect gas laws on the basis of published and historically researched works. Indicates the presence of eight features in giving a scientist credit for a scientific discovery. (CC)