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Calories on nutrition information label
What does the Kcal and KJ on the nutrition information on food labels in the Energy column mean? Which one is the calories? And why are they two different amounts? Please help
Answers
No best answer has yet been selected by MunkeyBoy. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.There are about 4.2 calories in a Joule (or is it the other way round?). Anyway, a calorie is the amount of heat needed to raise the temperature of 1 gramme of water by 1 degree Celsius. A Calorie is the amount of heat needed to raise the temperature of 1 kilogramme of water by 1 degree Celsius. There are 1000 calories in a Calorie, so a Calorie is often called a kilocalorie or a Kcal.
A Joule is the amount or work done by a force of 1 newton for 1 second (I think) (or something like that). As far as physicists are concerned, "work", "heat" and "energy" are all the same thing really.
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