Your Safer Source for Science
All-In-One Science Solution
Your Safer Source for Science
Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
Email [email protected]
Item #: PF2000 

Price: $75.00

Performance Assessment

In this lab experience, students examine real data for several fuels and measure the energy densities of two of them to confirm that differences in composition and structure cause differences in properties. Students should come to understand that different fuel sources have different chemical compositions and therefore different chemical structures. When a fuel burns the bonds that hold its constituent atoms together break on the reactant side of a chemical equation and then reform on the product side of a chemical equation. This process results in the release or absorption of energy. We can calculate the amount of energy associated with a chemical reaction by indirectly monitoring its temperature (i.e., the temperature of water the reaction is used to heat). Students should recognize that despite evidence to the contrary (e.g., the charring of wood splints), mass is not destroyed in a chemical reaction, only transformed.

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Product Details

Safety: Before conducting the lab, review the safety precautions on the student page with the class. Then discuss any safety precautions that are specific to your science laboratory or classroom. Good ventilation is required since burning fuels can generate a large amount of smoke. Allow some time between trials so the smoke has time to dissipate.


Materials Included in Kit

Consumable:
Ethanol, 95%, 500 mL
Aluminum foil, roll
Wood splints, package of 100

Non-Consumable:
Alcohol burner, 10


Additional Materials Required
Butane Safety Lighter, 10
Cylinder, Borosilicate Glass, 50 mL, 10
Flinn Scientific Electronic Balance, 410 x 0.01-g, 10
Ring Support, with Rod Clamp, 4", 10
Stirring Rods, Glass, 10
Support Stand, 6" x 9", 10
Flinn Digital Thermometer, 10
Tongs, 10