1 food calorie or Calorie or kilocalorie is equivalent of 1000 calories and thus 5 food calories is equal to 5000 heat calories.
Answer
A 'food calorie' is a unit of measurement that people in the food industry are either too lazy or too stupid to call a 'kilocalorie' (kcal).
A calorie is a calorie. There is no such thing as a 'food calorie'. A calorie measures energy. Any energy. However, it is an obsolete unit that was used in the old centimetre-gram-second-ampere system. When used to describe food energy, it should be 'kilocalories' NOT calories (calories are not capitalised).
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