The 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 law of conservation of energy states that the energy is always conserved in a closed system. The first law of thermodynamics is that change in internal energy = heat energy supplied to the system + work done on the system. Hence in both cases, the total energy is conserved.
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About First Law of Thermodynamics
The first law states that energy is conserved, so the change in a system's internal energy equals heat supplied plus work done on the system, ΔU = q + w. Questions use sign conventions, expansion and compression work, state functions versus path functions, and the relation between internal energy and enthalpy.
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