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    Question

    Assess the accuracy of these statements concerning entropy and thermodynamic equilibrium:

    (I) Entropy measures the disorder or randomness within a system.

    (II) At thermodynamic equilibrium, a system's entropy reaches its maximum.

    (III) Entropy decreases in reversible processes.

    A (I) and (II) only Correct Answer Incorrect Answer
    B (II) and (III) only Correct Answer Incorrect Answer
    C (I) and (III) only Correct Answer Incorrect Answer
    D (I), (II), and (III) Correct Answer Incorrect Answer

    Solution

    Entropy is indeed a measure of disorder or randomness within a system, and at thermodynamic equilibrium, entropy is maximized, reflecting the most disordered state. Statement (III) is incorrect because entropy remains constant in a truly reversible process and increases in real, irreversible processes.

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