3 March 2012
Calorimetry Lab report
Cheeto calorie counting
The purpose of this experiment is to use calorimetry to determine the number of calories in a Cheeto and compare that to the advertised caloric value using percent error. Introduction
The amount of heat needed to increase the temperature of an object exactly 1°C is the heat capacity of that object. The specific heat capacity of a substance is then the amount of heat it takes to raise the temperature of 1g of the substance1°C. Caliometry is the precise measurement of the heat flow into or out of a system for chemical and physical processes. Heat flow is measured in two common units, the calorie and the Joule. 1 calorie= 1 kilocalorie = 1000 calories. A calorimeter is the device used to measure the absorption or release of heat. In this lab, the water in aluminum can “calorimeter” gains the heat lost during the combustion of a Cheeto. Materials
-2 Cheeto puffs cheese-flavored snacks
-Empty soda can with ring still attatched
-Glass stir rod
-Aluminum Foil Square
-Triple beam balance
-Graduated cylinder (100ml)
-Wooden splint and lighter
1. Take a Cheeto and skewer it on the end of the paper clip. 2. Place the skewered Cheeto and aluminum foil on the triple beam balance so it rests horizontally to the tabletop. Take the mass and record. 3. Place the aluminum foil and Cheeto directly below the pop can. 4. Take the mass of the aluminum pop can. Record.
5. Measure about 100 mL of water and pour into can. Take the mass of the pop can and the water. Record. 6. Place the can back in the original setup making sure the Cheeto is less than 10cm from the bottom of the soda can 7. Measure the temperature of the water in the can. Record 8. Using a lit wooden splint, light both ends of the Cheeto on fire. Pull the splint away as soon as the Cheeto is lit. 9. Watch until...
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