The sum of all kinds of energy of system is called internal energy. They include
Correct answer: D. All of these
- A. Translational energy only
- B. All kinds of kinetic energy
- C. Elastic potential energy only
- D. All of these
Explanation
Internal energy is the total of all types of energy present within a system. This includes translational energy, various forms of kinetic energy, and potential energy, such as elastic potential energy. Each of the individual options (translational energy only, all kinds of kinetic energy, elastic potential energy only) represents just a part of the total internal energy. Therefore, the correct answer is that all these forms of energy contribute to the internal energy of a system.
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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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