Discussion
1 kcal expressed in kilojoules is about
Answer: C
Correct answer: 4.19
A calorie was defined as the heat raising a gram of water by one degree, and the mechanical equivalent is 4.187 joules. So a kilocalorie is about 4.19 kilojoules. The figure appears constantly in fuel and steam calculations, where calorific values are still often quoted in kilocalories.
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