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Make up Calorimetr y Lab … get the lab tables & question packet from your teacher first.

Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

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Page 1: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

Make up Calorimetry

Lab

… get the lab tables & question packet from your teacher first.

Page 2: 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.

Page 3: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

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)

Page 4: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• The equation used to calculate this is….

calorie = mwater C ∆ T

m = mass water

C = specific heat of water

T = temperature in ˚C

Page 5: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

Procedures

• Collect all of your materials at your desk.

• Mass each of your three foods and record your data in the table 1.

Page 6: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• Set up your equipment shown in the pictures.

Page 7: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• Measure 100 mL of water and pour it into the soda can.

• Measure the temperature and record in table 1.

Page 8: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• 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.

Page 9: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• Mass what is left of your burnt food item. Record the mass in your table.

Page 10: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

Using the table below, calculate the ∆T and change in mass. Record your information on the

table in the lab.

Page 11: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

Using the equation:calorie = m C ∆T calculate and complete the

following table in your lab writeup.

Page 12: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

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

Page 13: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

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

Page 14: Make up Calorimetry Lab … get the lab tables & question packet from your teacher first

• Complete the questions for the lab and hand the completed lab into your teacher.