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easyQ. No. 15112-how-many-joules-are-equal-to-1-calorie
How many joules are equal to 1 calorie?
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A2.186 J
B3.186 J
C4.186 J
D5.186 J
Correct Answer: 4.186 JYour Answer: C
Explanation
Option A (2.186 J) is incorrect — this is not the correct value. The mechanical equivalent of heat is not 2.186 J/cal. Option B (3.186 J) is incorrect — this value is also wrong. No standard thermodynamic relationship gives 3.186 J per calorie. Option C (4.186 J) is CORRECT — 1 calorie = 4.186 joules. Option D (5.186 J) is incorrect — this value is too high. The correct value is 4.186 J/cal, not 5.186.
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