Define one calorie and state how it is related to the 5.1. unit of heat energy.
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Calorie, a unit of energy or heat variously defined. 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. ... A unit of heat energy used in thermochemistry is the thermochemical calorie, equal to 4.184 joules.
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