Question

An "energy bar" contains 18 g of carbohydrates. How much energy is this in joules? How much energy is this in calories? How much energy is this in k-calories (Calories)?

Answer 1

An energy bar with 18 g of carbohydrates provides 72 kilocalories (kcal), which is equivalent to 301,248 joules (J) of energy, based on the average energy content of carbohydrates and conversion factors.

Step-by-step explanation:

An energy bar that contains 18 g of carbohydrates provides a certain amount of energy, which can be calculated based on the average energy content of carbohydrates. On average, one gram of carbohydrates provides about 4 Calories, or 4 kilocalories (kcal), of energy. To convert this energy into joules (J), we can use the conversion factor where 1 kcal = 4184 J.

First, we need to calculate the energy in kilocalories by using the average energy content of carbohydrates: 18 g × 4 kcal/g = 72 kcal.
Then, we can convert the energy from kilocalories to joules: 72 kcal × 4184 J/kcal = 301,248 J.