The calorie content of a candy bar is 230 calories per serving (1 bar).Calculate the specific energy (kJ/g)of the candy bar.(1 candy bar = 52.7 g,1 calorie = 4.184 J)

Question

Quizplus · Accepted Answer

To calculate the specific energy, we need to divide the energy content (in joules) by the mass of the candy bar (in grams).

Energy content (in J) = 230 calories x 4.184 J/calorie = 962.12 J
Mass of candy bar = 52.7 g

Specific energy = Energy content / Mass
Specific energy = 962.12 J / 52.7 g = 18.3 J/g or kJ/g (since 1 kJ = 1000 J)

Therefore, the best choice is B, with a specific energy of 18.3 kJ/g.

The Calorie Content of a Candy Bar Is 230 Calories