Calories! In this problem you will test the idea that most of the calories in fo

Question

Calories! In this problem you will test the idea that most of the calories in food product come from fats, carbohydrates, and protein. Find out how many grams of fats/carbohydrates/protein are in the following food products (see the "nutritional information" panel on the product container or look up the info online). Then use the following approximate enthalpies of combustion for "fat", "carbohydrate", and "protein" (-39 kJ/g, -16.5 kJ/g, and -23 kJ/g, respectively) to estimate what the caloric content would be for each food product. Compare the value you calculate for calories with the value provided by the manufacturer. Recall that nutritional calories, or kcal, are 1000 scientific calories, and that there are 4.18 Joules in one scientific calorie. -Dazs vanilla ice cream A 12 ounce serving of Thomas Kempers root beer Something "healthy" that you like to eat Something "unhealthy" that you like to eat How well do the estimates agree for these foods?

Explanation / Answer

fat:-39KJ/g=-39*4.18=-163.02KCal

carbohydrate:-16.5KJ=16.5*4.18=68.97Kcal

protein:-23KJ=23*4.18=96.14Kcal

in these three more caloric food is fat because it gives more calories on burning tha the rest of others.

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