Describes an analog computer which serves as a visual aid that calculates the amounts of all substances in an equilibrium mixture as well as during the reaction. (MLH)

Describes some modifications and rearrangements of topics that were adopted in teaching two units in an advanced chemistry course for high school students: on inorganic chemistry, and on energy and thermodynamics. (GA)

Illustrates qualitative and metaphoric applications of entropy in the areas of cosmology, the birth and death of the universe and time; life and evolution; literature and art; and social science. (RT)

Describes a laboratory experiment which explores the effects of adding inert salts to electrolytic cells and demonstrates the difference between concentration and chemical activity. Examines chemical potentials as the driving force of reactions. Provides five examples of cell potential and concentration change. (JM)

Provides materials needed and procedures to illustrate the reversible color changes in certain organic acids on bases due to changes in pH. The technique employs three indicators which are colorless in acidic solution but form primary colors in basic solutions. Also discusses the free energy curve presented in many textbooks. (JM)

Describes the procedures and equipment for an experiment on the adiabatic expansion of gases suitable for demonstration and discussion in the physical chemical laboratory. The expansion produced shows how the process can change temperature and still return to a different location on an isotherm. (JN)

Reviews some of the literature concerned with teaching heat, briefly assessing treatments of the subject given in a number of textbooks and considering misconceptions which can develop from the way heat is currently taught in many schools. Suggests an approach for developing an understanding of heat and associated thermodynamic concepts. (JN)

Describes a lecture demonstration of a solid state phase transition using a thermodynamic material which changes state at room temperature. Also describes a demonstration on kinetics using a "Big Bang" (trade mark) calcium carbide cannon. Indicates that the cannon is safe to use. (JN)

Discusses low temperature heat transfer, transient heat transfer, and developments in steady state heat transfer. (SK)

Discusses various aspects of polymeric mixtures, mixtures of structurally different homopolymers, copolymers, terpolymers, and the like. Defines concepts of polymer-polymer miscibility from practical and theoretical viewpoints, and ways of predicting such miscibility. (JN)

Describes a project for students to collect and fit data to a theoretical mathematical model that describes the rate of isothermal seed germination, including activation energy for substrate and produce and the autocatalytic reaction, and changes in enthalpy, entropy, and the Gibb's free energy. (Author/SK)

Suggests using thematic approach for physics instruction based on the broad theme of energy resources. Presents physics pathways from student and lecturer viewpoints, and describes how the course operates. (SK)

Presents a practical problem to students in a junior-level thermodynamics course in which a human body regulates its own internal temperature. This problem can be utilized as well (with modification) in an introductory physics course for life science majors. (HM)

Outlines the contributions of J. H. Jeans to the laws of radiation and explains the interactions of Jeans with Rayleigh and Lorentz. (GS)