This study recalculates outdated values for thermochemical radii using more reliable and elaborate calculations of lattice energy and recently obtained ancillary thermodynamic data. (BT)

Discusses the concepts involved in constructing a meaningful free energy plot for a chemical reaction and how these concepts are sometimes insufficiently represented in textbooks. (MLH)

Basic chemical thermodynamics usually treats non-p,T reactions in a stepmotherly fashion. This paper covers the main aspects of the theoretical principles of reactions (p,T; V,T; p,H; and V,U) and offers results from the ABC computer program, which was designed to show the validity of the equilibrium theory to all types of reaction modes. (PVD)

Generated are over 70 chemical reactions which constitutes a minicourse in descriptive chemistry and is designed to help foster "chemical literacy". Both aqueous and nonaqueous chemical reactions are discussed. (KR)

Presents two classroom activities that help students visualize the concept of entropy and appreciate that entropy tends to increase spontaneously. Contains 20 references. (WRM)

Summarizes chemical principles underlying the operation of automobiles and the cause of air pollution, including concentrations of carbon monoxide, unburned hydrocarbons, and oxides of nitrogen. Comments and opinions are made concerning present and future pollution control devices. (CC)

Presents a detailed analysis of the thermodynamic equation dE = TdS - PdV to illustrate how chemistry teachers may present chemical potential by a route free from the terrors of partial derivatives. (MR)

Describes an experiment simulating heat transfer and overall energy loss in upper layers of soil surfaces. (SL)

Shows how the thermodynamic condition for equilibrium in an isolated system can be derived by the application of Boltzmann's law to a simple physical system. States that this derivation could be included in an introductory course on chemical equilibrium to help prepare students for a statistical mechanical treatment presented in the curriculum.…

Discusses theory of thermodynamics of the equilibrium in solution and dissociation-dimerization kinetics. Describes experimental procedure including determination of molar absorptivity and equilibrium constant, reaction enthalpy, and kinetics of the dissociation-dimerization reaction. (JM)

Procedures for demonstrating thermodynamic changes, kinetics and reaction mechanisms, equilibrium, and LeChatelier's principle are presented. The only materials needed for these demonstrations are beakers, water, assorted wooden blocks of varying thickness, assorted rubber tubing, and a sponge. The concepts illustrated in each demonstration are…

Discusses the values presented in various handbooks for the boiling point and heat of vaporization of sulfuric acid, noting discrepencies. Analyzes various approaches to data presentation, discussing the data on sulfuric acid in light of the Trouton constant. Points out the need for a more critical use of tables. (JM)

Describes a simulated laboratory research project in which the thermodynamic and kinetic aspects of ammonia synthesis are simulated on a computer. (MLH)