NEET Chemistry First Law MCQ Question
Which of the following combinations accurately reflects the principles of the first law of thermodynamics?
The change in internal energy of a system is the sum of heat added to the system and work done on the system.
A system can gain energy through heat transfer alone, regardless of work done.
In an isolated system, energy can be created from nothing as long as heat is conserved.
The total energy in a closed system remains constant, even if work is done on or by the system.
Correct Answer
Detailed Explanation
According to the first law of thermodynamics, the change in internal energy (∆U) is indeed the sum of the heat (q) added to the system and the work (w) done on the system, as stated in the equation ∆U = q + w. This reflects the conservation of energy principle.
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