Chemistry-Entropy
NEET Chemistry Entropy MCQ Question
Type: MCQ-conceptual-Hard-Class 11
For an ideal gas undergoing an isothermal and irreversible expansion, which of the following statements regarding entropy change is correct?
A
The total entropy change is zero.
B
The entropy of the surroundings decreases.
C
The entropy of the system increases.
D
The internal energy change is positive.
Correct Answer
Option C
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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