Question

In: Chemistry

Determine the food energy in a snickers bar, given the following nutritional content: 4.3 g protein,...

Determine the food energy in a snickers bar, given the following nutritional content: 4.3 g protein, 16.4 g fat, and 34.5 g carbohydrate.

Solutions

Expert Solution

In snickers bar total energy defferent nutritional content multiply with defferent calories example - carbohydrate given 4 calories per gram and protein also give 4 calories per gram and fat given by 9 calories per gram

step 1

multiply grams of carbohydrate in the food by 4 calories per gram . a calories is unit of how much energy is in given amount of food . regardless of whether the carbohydrate in food is sugar or starch. all carbohydrates provide the the energy in body with 4 calories/gram.

energy of carbohydrates in snickers 4*34.5=138 calories

step 2

multiply grams of fat in the food by 9 calories per gram. some contain more than 9 calories/gram while other contain less. altimatly, in the human diet tends to consist of a mixture of fats the average out to around 9 calories/gram.

energy of fat in snickers 9*16.4 =149.6calories

step 3

multiply grams of protein in the food by 4 calories/gram. it does not matter what kind of protein a food contains because all protein provide the same energy per unit mass . protein are all composed of the same basic building blocks.

energy of protein in snicker 4.3*4=17.2 calorie |

Total energy of snicker bar   

energy of protein + energy of fat + energy of carbohydrate = total energy

17.2 + 149.6 + 138 = 364.8 calorie .


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