Which one of the following is NOT the unit of heat:
Correct answer: B. Kelvin
- A. Joule
- B. Kelvin
- C. Calorie
- D. Kilojoule (kJ)
Explanation
Option B is correct because Kelvin is the unit for measuring temperature, not heat. Heat is a form of energy, and its units include Joule, Calorie, and Kilojoule. Joule and Calorie are both units of energy, and thus applicable to heat measurements. Kilojoule is simply a larger unit of energy than a joule, and is equally applicable for heat. Therefore, Kelvin is the outlier as it is exclusively a temperature unit.
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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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