(10 points) With the increasing concerns to health, the calorie content of the m

Question

(10 points) With the increasing concerns to health, the calorie content of the meal has become an important factor affecting customer’s decision in restaurant. The calorie content of food is usually measured using the bomb calorimeter. Write a short essay (with a maximum length of ONE page, using Times New Roman, 12 point, single space,) about the operation principle of the bomb calorimeter, its operation procedure, and list the calories of at least 5 meals sold in fast food chain restaurants such as McDonalds, Burger King, Subway, or others. You may use picture, Figure, and table in your answers.

Explanation / Answer

The fundamental principle of this apparatus is the direct determination of the volume of oxygen required to burn a known weight of a substance and the computation therefrom of the potential'energy of the substance, based upon a series of factors for the calorific value of a liter of oxygen previously established by combustion of similar material in a bomb calorimeter. In a pure substance, such as sucrose, the amount of oxygen involved in the combustion of 1 gm. can readily be computed. Since the heat of combustion is accurately known, the calorific value of each liter of oxygen can be calculated.

563

Chicken Drumsticks, Original, Kentucky Fried Chicken 170.0kcal

windey's 540kcal

Arby's 566kcal

563

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