Lab Report Caloric Content of Food Purpose

Students Name Date of Experiment- 11/27/12 Date Report Submitted 11/27/12 Title Caloric Content of Food Purpose to be able to measure the energy content of victualss Procedure We are going to take food items and burn them to commove water to be able to determine the amount of energy a food source can emit. Data bows Data Table 1 Food Item Observations Food Item Description Marshmallow Peanut / Walnut Potato Chip freshet of food & holder sign 40. 2g 18. 0g 15g Mass of food & holder final 38. 6g 16. 0g 12. g Mass of food burnt 1. 6g 2g 2. 5g Mass of beaker 66. 5g 66. 4g 66. 5g Mass of beaker & water 107. 2g 108. 2g 108. 2g Mass of water 40. 7g 41. g 41. 7g Water temp. initial 23 C 22 C 22 C Water temp. final 31 C 72 C 32 C Delta T (oC change) 8 C 50 C 10 C Observations The observations are noted above.Found it very interesting that the peanut was able to produce enough heat to change the temperature of the water so much. Questions A. Which of the foods tested conta ins the most energy per gram? The potato chip B. How do your experimental results compare to published values? I would say that my results were average C. What type of reaction is used in calorimetry? Combustion reaction D. What are the products of the reactions? Carbon dioxide and water E. Where did the products go? They vaporized into the air F.A bookman performing an experiment to determine the caloric content of a cashew nut collected the following data ?Mass of cashew nut onwards burning 0. 55 g ?After burning 0. 05 g ?Temp. increase of 200 g of water 7. 0 oC 1. Calculate the total energy released by the combustion of the cashew nut by using the water temp. increase, the mass of the water and specific heat capacity of water. q=delta t x m x cp 58576 joules 2. Calculate the energy released per gram of cashew nut consumed in the reaction. 58,576j/0. 55g= 106502/4. 184= 24,455 or 2. cal 3. Using the following standards (carbohydrates (4 Cal/g), protein (4 Cal/g), and fats 9 Cal/ g), determine the caloric content of a infrastructure of your favorite snack food. Chili cheese fritos Carbs=60 Protein= 8 Fats= 90 Conclusions Remember Lab notes are evidence of your work and of your understanding of the concepts demonstrated in the experiments. They are also the primary basis for your chemistry lab grade. Write neatly and try to express your thoughts clearly, concisely, and completely so that someone else could duplicate your results.