The sum of all the energies present in a reaction mixture or system is called:
Correct answer: C. Internal energy
- A. Thermal energy
- B. Total heat content
- C. Internal energy
- D. Enthalpy
Explanation
The sum of all the energies present in a reaction mixture or system is called the "internal energy" (U). Internal energy encompasses the total energy associated with the kinetic and potential energies of particles within a system, including their motions and interactions.
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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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728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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