Question

Express the calorie content of a piece of pumpkin pie (346 calories) in kJ and J.

A) 1.45 kJ, 1450 J
B) 1440 kJ, 1.44 J
C) 1445 kJ, 14450 J
D) 1446 kJ, 14460 J

Answer 1

To express the calorie content of pumpkin pie in kJ and J, we need to convert the calories to kilocalories and then to kilojoules and joules. The correct answer is option C) 1445 kJ, 14450 J.

Step-by-step explanation:

To convert the calorie content of pumpkin pie (346 calories) to kJ and J, we can use the conversion factor based on the relation 1 calorie (C) = 4.184 J. We can start by converting the calories to kilocalories:

346 calories = 346/1000 kilocalories = 0.346 kilocalories

Next, we can convert kilocalories to kilojoules by using the relation 1 kilocalorie (kcal) = 4.184 kilojoules (kJ):

0.346 kilocalories = 0.346 x 4.184 kilojoules = 1.445 kJ

Finally, we can convert kilojoules to joules by using the relation 1 kilojoule (kJ) = 1000 joules (J):

1.445 kilojoules = 1.445 x 1000 joules = 1445 J

Therefore, the calorie content of a piece of pumpkin pie is equivalent to 1.445 kJ and 1445 J. So, the correct answer is option C) 1445 kJ, 14450 J.