Law of conservation of energy is actually:
Correct answer: C. First law of thermodynamics
- A. Second law of thermodynamics
- B. Third law of thermodynamics
- C. First law of thermodynamics
- D. Zeroth law of thermodynamics
Explanation
The correct answer is the First Law of Thermodynamics, which directly restates the Law of Conservation of Energy. It asserts that energy within a closed system remains constant, though it may change forms. The other options are incorrect as they relate to different aspects of thermodynamic processes: the Second Law addresses entropy, the Third Law pertains to absolute zero conditions, and the Zeroth Law deals with thermal equilibrium.
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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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