Use Figure 12.2 to determine which macronutrient would produce the greatest amount of energy fro

Use Figure 12.2 to determine which macronutrient would...

Key Concepts

Macronutrients

Macronutrients are the primary nutrients required by the body in large amounts, namely carbohydrates, proteins, and fats. They not only provide the energy necessary for bodily functions but also serve structural and regulatory roles.

Energy Density

Energy density refers to the amount of energy that a particular nutrient provides per gram. It is a key factor in understanding how much fuel each gram of a macronutrient delivers during metabolism.

Caloric Value of Fats

Among the macronutrients, fats have the highest energy density, providing approximately 9 calories per gram. This makes fats the most energy-dense macronutrient compared to carbohydrates and proteins, which typically provide about 4 calories per gram.

Transcript

00:01 Okay, guys, so today we're going to be working on question number 90 in chapter 5 of chemistry, the central science.

00:09 So this is a three -part question.

00:11 Part a asks, which releases the most energy when metabolized? one gram of carbohydrates or one gram of fat.

00:17 So here we have to go to table 5 .5, which is over here, we see the amount of calorie content for carbohydrates, which is c, fats, which is f, and proteins, which is p.

00:33 So we have four calories being produced for every gram of carbohydrates that's being metabolized.

00:40 And we have nine calories being produced for every gram of fat that's being metabolized.

00:46 So that means that one gram of fat is going to produce nine calories and one gram of carbohydrate is going to be producing four calories.

00:52 So one gram of fat produces more calories than one gram of carbohydrates.

00:57 Now for part b, we do a snack food that is composed of 12 % protein, 14 % fat, and the rest is composed of carbohydrates, in this case, 74 % carbohydrates.

01:08 So that means one gram of this chip is 0 .12 grams protein, 0 .14 gram fat, and 0 .74 gram carbohydrates.

01:19 So what they want to see, what percent of the calorie content of the food is fat? so we're going to figure out how many calories the chip burns on its own.

01:28 So we're going to multiply 0 .12 grams, amps of our protein.

01:35 By the amount of calories at least per gram of our protein, 6 times 4 calories per gram, m is equal to 0 .484 calories for the protein content.

02:08 Then we have 0 .14 grams of our fat, multiply it by 9 calories per gram, which produces 1 .26 calories.

02:45 Then we have 0 .74 grams of carbohydrates times 4 calories per gram, which equals 1 .74 times 4 calories per gram.

03:26 That's 2 .96 calories...

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