What is the value of one calorie in joule?
Correct answer: C. 4.18 J
- A. 4.98 J
- B. 7.98 J
- C. 4.18 J
- D. 8.21 J
Explanation
One calorie is approximately equal to 4.18 joules. This conversion factor is used to convert energy measurements between the calorie (often used in nutrition) and the joule (the standard unit of energy in the International System of Units, SI).
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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