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.