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Price: $71.25
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With this FlinnEverydayScience™ lab, students design an experimental procedure to determine the best material for a commercial handwarmer.
This item can only be shipped to schools, museums and science centers
Students dissolve ionic solids in water and observe the temperature changes that result from the dissolutions. This process is relied on for designing cold and hot packs. Students will be given several solids and must design an experimental procedure to determine the best material for a handwarmer. This requires them to consider experimental data as well as cost information, much like scientists and engineers do when designing products for specific applications. Students learn about thermal energy, energy transfer, solutions, experimental design, and product design. Includes access to pre-lab videos, editable lab instructions, downloadable student handouts, detailed background information, teacher notes with answers to all questions and sample data, and teaching and lab tips.
This kit includes enough materials for 24 students working in pairs.
This kit includes:
Ammonium chloride, reagent, 120 g
Calcium chloride, anhydrous, 120 g
Lithium chloride, 120 g
Sodium acetate, lab grade, 120 g
Sodium carbonate, 125 g
Sodium chloride, 120 g
Cup, polystyrene, 8 oz, 25
Additional Materials Required (for each lab group): Deionized or distilled water, 0.01-g precision balance (shared), beaker, graduated cylinder, hot plate (shared), magnetic stirrer and stir bar or stirring rod, paper towels, thermometer, timer or stopwatch.
