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Lab Procedure

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Words 840
Pages 4
Materials
● Water
● Fire/matches
● Test tube
● Needle
● Cork
● Reese’s
● Almond Joy
● Skittles
● Snickers
● M & M’s
● Computer
● Vernier computer interface
● Balance
● Ring stand
● 100 mL Graduated cylinder

Procedure
1. Obtain and wear goggles. Safety #1
2. Obtain a sample of food and a food holder. Mount the food onto the food holder so that it can burn without damaging the holder. Find and record the initial mass of the food sample and food holder.
CAUTION: Do not eat or drink in the laboratory.
3. Connect the Temperature Probe to the computer interface. Prepare the computer for data collection by opening the file “01 Energy in Food” from the Biology with Vernier folder of Logger Pro.
4. Set up the apparatus shown generally …show more content…
Place 50 mL of cold water into the test tube.
b. Record the mass of the water.
c. Position the test tube 1.5 -2.0 cm above the food sample.
d. Suspend the temperature probe in the water. The probe should not touch the bottom or side of the test tube.

5. Click to begin data collection. Record the initial temperature of the water in Table 1.
6. Remove the food sample from under the test tube and use a match to light it. Quickly place the burning food sample directly under the test tube. Stir the water constantly. CAUTION: Keep hair and clothing away from an open flame.
7. After 4 minutes, if the food is still burning, blow the flame out. Record the maximum temperature of the water in Table 1.
8. Once the water temperature begins to decrease, end data collection by clicking STOP.
9. Determine the final mass of the food sample and food holder.
10. You can confirm your data by clicking the Statistics button. The minimum temperature and maximum temperature are listed in the floating box.
11. Repeat Steps 4–10 for two more trials of the food sample. Be sure to use a new 50 mL portion of cold water each time.

Background

What is Calorimetry? Calorimetry the is the process of measuring the amount of heat released or absorbed during a chemical

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