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Make up Calorimetry
Lab
… get the lab tables & question packet from your teacher first.
Purpose:
• The purpose of this lab is to learn how the number of calories are calculated using foods.
Background Information
• The unit of heat measurement is called a calorie
• calorie = the amount of energy to heat 1 gram of water 1 ˚C
• Calorie = 1000 calories / 1 kilocalorie /(Food calorie)
• The equation used to calculate this is….
calorie = mwater C ∆ T
m = mass water
C = specific heat of water
T = temperature in ˚C
Procedures
• Collect all of your materials at your desk.
• Mass each of your three foods and record your data in the table 1.
• Set up your equipment shown in the pictures.
• Measure 100 mL of water and pour it into the soda can.
• Measure the temperature and record in table 1.
• Light your food on fire and allow to burn completely…… if it goes out then relight until it is burned.
• When it goes out record the temperature of the water now and every 30 seconds for the next 2 minutes.
• Mass what is left of your burnt food item. Record the mass in your table.
Using the table below, calculate the ∆T and change in mass. Record your information on the
table in the lab.
Using the equation:calorie = m C ∆T calculate and complete the
following table in your lab writeup.
Using the “given” caloric values for each food used calculate the percent error for each food.
• Use the equation:% error = given value – calculated value
______________________ X 100
given value
Graph the average kcals/g side-by-side with the “given” values for each food. Use the following set
up for your graph.
Title – Figure 1: Average kcals/g for foods
X axis – food types
Y axis – average kcals / g
• Complete the questions for the lab and hand the completed lab into your teacher.