Describes the laws of thermodynamics as a supplement to an introductory thermodynamics undergraduate course. Uses rubber-elastic materials (REM) which have strong analogies to the concept of ideal gas. Provides examples of the analogies between ideal gas and REM and mathematical analogies. (YDS)

Describes the use of calculator based laboratory (CBL) technology in monitoring the process of chemical reactions. Explains the estimation of infinity readings and criteria to choose t values. (YDS)

Introduces a student activity that explains acid base reactions with a carbon dioxide reactant. Includes both instructor information and student activity sheet. (YDS)

Presents an activity that uses supermarket chemicals to perform a clock reaction in which the endpoint is signaled by an abrupt change in the appearance from colorless to blue-black. This activity can be used to explore reaction kinetics and the effect of reactant concentrations on the apparent rate of reaction. (DDR)

Describes an iodine clock reaction that produces an effect similar to the Landolt clock reaction. This reaction uses supermarket chemicals and avoids iodate, bisulfite, and mercury compounds. Ascorbic acid and tincture of iodine are the main reactants with alternate procedures provided for vitamin C tablets and orange juice. (DDR)

Describes a dramatic chemical demonstration in which chemicals that are black and white combine to produce a colorless liquid. Reactants include tincture of iodine, bleach, white vinegar, Epsom salt, vitamin C tablets, and liquid laundry starch. (DDR)

Reports the discovery of an efficient base composition for making bengal lights that is obtained with potassium chlorate and thiourea. Combining this mixture with appropriate flame coloring can produce several impressive bengal lights. (DDR)

Presents observations of students' self-assessment capabilities. Describes the use of a new interactive question type that looks directly at self-assessment and its relationship to success on content questions. (DDR)

Discusses the responsibilities of scientists on the issue of gender equity in the sciences. Explains the necessary steps to increase female involvement in the sciences and achieve gender equity. (Contains 12 references.) (YDS)

Presents three quote box puzzles in which given letters are dropped vertically in each column (given order does not necessarily represent the appearance) and form a quotation when read from left to right, line by line. (YDS)

Introduces a scientific mystery story problem on the chemical and physical properties of metals involving characters Sherlock Holmes and Dr. Watson. (YDS)

Uses popular sayings and proverbs to introduce chemical phenomena. Presents an exercise including 26 chemical concepts identified with matching proverbs and sayings. (YDS)

Describes a project that integrates active learning into service learning targeting both college students and middle schools students wherein college students perform chemical demonstrations for middle school students. (YDS)

Describes a laboratory experiment on the determination of the molecular weights of gases lighter than air. (YDS)

Describes a chemistry demonstration on freezing point depression wherein students investigate the effects of adding various substances to ice water. Includes instructor information and a student activity sheet. (YDS)