NEET Chemistry First Law MCQ Question
Which of the following statements about the First Law of Thermodynamics is correct?
The change in internal energy of a system is always equal to the heat added to the system plus the work done on the system.
The First Law states that energy can be created or destroyed in a closed system.
In an isolated system, the change in internal energy is dependent on the path taken during the process.
If no heat or work is transferred, the internal energy of a system is unchanged.
Correct Answer
Detailed Explanation
The First Law of Thermodynamics states that the change in internal energy (∆U) of a system is equal to the heat (q) added to the system plus the work (w) done on the system (∆U = q + w). This law emphasizes the conservation of energy principle, which implies that energy cannot be created or destroyed.
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