Assume that 12% of the body mass of an 200 pound person is made up of triacylgly

Question

Assume that 12% of the body mass of an 200 pound person is made up of triacylglycerols. What is this person's total fuel reserve (in kilocalories) in the form of triacylglycerols? Hint: the conversion factor you need is 9 Calories per gram of fat. Remember that a capital "C" Calorie is equal to 1000 little "c" calories or 1 kcal. Also, there are 2.2046 lbs. per kg. Enter your answer to the nearest ones, but please note that such an answer has far more precision than is warranted; the answer is requested to the nearest ones because Canvas does not allow answers such as “…to the nearest thousand.”

Explanation / Answer

Ans. Total fat content of body = 12 % of 200 lb

                                                = 24 lb                                                ; [1 kg = 2.2046 lb]

                                                = 10.88632 kg                                  

                                                = 10886.32 g                                     ; [1 kg = 1000 g]

Given, calorific value of fat = 9 Cal/ g

                                                = 9 kcal/g

                                                = 37.656 kJ/g                                    ; [1 cal = 4.184 J]

Now,

Total fuel reserve = Total fat content x Calorific value of fat

                                                = 10886.32 g x (37.656 kJ/g)

                                                = 409935.27 kJ

                                                = 409935 kJ

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