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Calorie
The name calorie is used for two units of energy.
  • The small calorie or gram calorie (symbol: cal) is the approximate amount of energy needed to raise the temperature of one gram of water by one degree Celsius at a pressure of one atmosphere.
  • The kilocalorie, also known as large calorie, kilogram calorie, food calorie, and similar names (symbols: kcal, Cal or C) is small calories.

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