Question

Define calorie. How many joules make one calorie?​

Answer 1

Answer:

The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius. Since 1925 this calorie has been defined in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules

Explanation:

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Answer 2

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The energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).