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The British Thermal Unit (BTU) is a traditional unit of heat. Option A (100 calories) is incorrect — 100 calories is not the equivalent of 1 BTU. Option B (186 calories) is incorrect — 186 is not the correct conversion. Some students confuse 4.186 (mechanical equivalent of heat) with BTU conversion, but these are entirely different values. Option C (252 calories) is CORRECT — 1 BTU is defined as the amount of heat required to raise the temperature of 1 pound of water by 1°F. This equals exactly 252 calories (or approximately 1055 joules). Option D (425 calories) is incorrect — 425 calories is not the equivalent of 1 BTU.
FAQ
Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
