Calorie

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Calorie

A unit of heat originally defined as the amount of heat required to raise the temperature of 1 gram of water through 1 C (the gram-calorie or small calorie).
Several calories are now in use: International Steam Table calorie = 4.1868 joules, mean calorie = 4.19002 joules, thermochemical calorie = 4.184 joules, 15 C calorie = 4.18580 joules, 20 C = 4.1890 joules. The kilogram calorie or kilocalorie is 1000 times as large as a calorie.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use