2.2.4 How Much Energy Is in Food? Madison

Introduction In this this lab you will learn how your body dissembles the food you eat by each bite and captures the energy stored in the molecules of your food. You will use a calorimeter and burn the food and then use the following formulas to figure then amount of energy.

Vocabulary Terms Calorimetry: The process used for measuring the amount of energy in food. Cellular Respiration: The glucose molecules travel to the body’s cells where a series of chemical reactions. Which ultimately make adenosine tri-phosphate (ATP). Calorimeter: This process is preformed in an apparatus called in a calorimeter. Calorie: the amount of energy needed to raise the temperature of 1 g of water 1 degree C.

Procedure Outline First you assemble the calorimeter Measure the temperature of the water and the mass of the food. Then you burn the food as much as possible with a long wooden kitchen match. Record all data Then do step 3 and 4 for the second food sample. Then use the following formulas to figure out the energy content and energy gained.

Formulas You use formulas to figure out Energy Gained and Energy content of food sample. Energy gained=(mass of water)x(change in temperature)x (specific heat of water) *Note that specific heat of water is 1 calorie/change in mass in food Energy Content of food sample=Energy gained by water/ change in mass of food