Final answer:
A chunky candy bar contains 380 food Calories which is equal to 380 kcal or 380,000 cal. To convert the energy equivalent to heat energy calories, you can use the conversion factors provided in the answer.
Step-by-step explanation:
Calories contained within food are actually kilocalories (kcal). In other words, if a certain snack contains 380 food calories, it actually contains 380 kcal or 380,000 cal. The conversion between a kilocalorie and a calorie is that 1 kilocalorie = 1 Calorie = 1000 calories. Heat changes in chemical reactions are typically measured in joules rather than calories. The conversion between a joule and a calorie is shown below:
1 J = 0.2390 cal or 1 cal = 4.184 J
To convert the energy equivalent from kcal to heat energy calories, you can use the conversion factors mentioned above.