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Lab 10 - Ocean County College Department of Chemistry...

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Ocean County College Department of Chemistry Experiment 10: Caloric Content of Food Submitted by Date Submitted: 07 APR 2010 Date Performed: 07 APR 2010 Lab Section: DL2 Course Instructor: Professor Maria Tamburro Purpose: Ocean County College 1 General Chemistry I DL2 Chemistry Department
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A calorie is a unit of energy. For this experiment it represents the amount of energy it would take to raise the temperature of one gram of water by one degree Celsius. The SI unit of energy is the joule which can be calculated from calories by multiplying it by 4.184 (specific heat of water). The object of this experiment is to determine energy content by burning a portion of food and capturing the heat released. We will do this by measuring the initial and final temperature of the water then we will use an equation to determine the energy released. We can then divide the resulting energy value by grams of food burned gives the energy content. Although, we must keep in mind that because much of the energy will be absorbed by the beaker and air are values will be lower than accepted values due to this experimental error. Procedure: I will start by determining the empty weight of my 100ml beaker. I will then half fill the beaker with water and weigh it again determining the net weight of the water. Next I will put aluminum foil on the table to catch any spills or residue from our food items. Next I will set up the burner stand over the aluminum foil and place the beaker of water on top of it. I will measure and record the initial temperature of the water. With my digital scale I will determine the mass of one of my food
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