NEET Chemistry Entropy MCQ Question
For an ideal gas undergoing an isothermal and irreversible expansion, which of the following statements regarding entropy change is correct?
The total entropy change is zero.
The entropy of the surroundings decreases.
The entropy of the system increases.
The internal energy change is positive.
Correct Answer
Detailed Explanation
In an isothermal and irreversible expansion, the internal energy change (∆U) is zero, but the total entropy change (∆S total) is not zero. The entropy of the system increases as it moves towards a more disordered state.
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